nginx + perl - stopped working after upgrading to Debina 8.1

I am currently playing around on my dev server, to try and get it running the latest Debian (Jessie). I've got it all upgraded using this tutorial:

http://linuxconfig.org/how-to-upgrade-d … le-release">http://linuxconfig.org/how-to-upgrade-debian-linux-system-from-wheezy-to-jessie-stable-release

The problem I'm not having, is that nginx doesn't seem to like running the Perl scripts. I get:

> 403 Forbidden

It was working fine before the upgrade - but it didn't mention during the upgrade that fastcgi configs had changed, and asked me if I wanted to leave it - or upgrade to the newer version. I chose to upgrade, but it seems to have broken it now. My config is pretty simple:

    location ~ \.cgi$ {
        try_files $uri =404;
        gzip off;
        include /etc/nginx/fastcgi_params;
        fastcgi_pass unix:/var/run/fcgiwrap.socket;
        fastcgi_index index.cgi;
        fastcgi_param SCRIPT_FILENAME /srv/www/site.net/www/cgi-bin/$fastcgi_script_name;
    }

Static / PHP scripts work fine - it just seems to be the Perl ones. Has anyone got any suggestions as to what I could try?

UPDATE: I updated the error_log, to spit out debug, and here is what I get.

> 2015/07/30 16:52:50 [debug] 5064#0: *48 write new buf t:1 f:0 00000000009CA978, pos 00000000009CA978, size: 162 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 http write filter: l:0 f:0 s:162

2015/07/30 16:52:50 [debug] 5064#0: *48 http cacheable: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 posix_memalign: 0000000000A1EE40:4096 @16

2015/07/30 16:52:50 [debug] 5064#0: *48 http upstream process upstream

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe read upstream: 1

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe preread: 45

2015/07/30 16:52:50 [debug] 5064#0: *48 readv: 1:3992

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe recv chain: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe buf free s:0 t:1 f:0 00000000009CFBB0, pos 00000000009CFBEB, size: 45 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe length: -1

2015/07/30 16:52:50 [debug] 5064#0: *48 input buf #0 00000000009CFBEB

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 01

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 06

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 01

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record length: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi closed stdout

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 01

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 03

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 01

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 08

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record byte: 00

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi record length: 8

2015/07/30 16:52:50 [debug] 5064#0: *48 http fastcgi sent end request

2015/07/30 16:52:50 [debug] 5064#0: *48 input buf 00000000009CFBEB 15

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe write downstream: 1

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe write downstream flush in

2015/07/30 16:52:50 [debug] 5064#0: *48 http output filter "/cgi-bin/page.cgi?"

2015/07/30 16:52:50 [debug] 5064#0: *48 http copy filter: "/cgi-bin/page.cgi?"

2015/07/30 16:52:50 [debug] 5064#0: *48 image filter

2015/07/30 16:52:50 [debug] 5064#0: *48 xslt filter body

2015/07/30 16:52:50 [debug] 5064#0: *48 http postpone filter "/cgi-bin/page.cgi?" 00000000009CAA40

2015/07/30 16:52:50 [debug] 5064#0: *48 http chunk: 15

2015/07/30 16:52:50 [debug] 5064#0: *48 write old buf t:1 f:0 00000000009CA978, pos 00000000009CA978, size: 162 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write new buf t:1 f:0 0000000000A1F010, pos 0000000000A1F010, size: 3 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write new buf t:1 f:0 00000000009CFBB0, pos 00000000009CFBEB, size: 15 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write new buf t:0 f:0 0000000000000000, pos 00000000004B2EBD, size: 2 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 http write filter: l:0 f:0 s:182

2015/07/30 16:52:50 [debug] 5064#0: *48 http copy filter: 0 "/cgi-bin/page.cgi?"

2015/07/30 16:52:50 [debug] 5064#0: *48 pipe write downstream done

2015/07/30 16:52:50 [debug] 5064#0: *48 event timer: 6, old: 1438271630291, new: 1438271630303

2015/07/30 16:52:50 [debug] 5064#0: *48 http upstream exit: 0000000000000000

2015/07/30 16:52:50 [debug] 5064#0: *48 finalize http upstream request: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 finalize http fastcgi request

2015/07/30 16:52:50 [debug] 5064#0: *48 free rr peer 1 0

2015/07/30 16:52:50 [debug] 5064#0: *48 close http upstream connection: 6

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 000000000097AD00, unused: 48

2015/07/30 16:52:50 [debug] 5064#0: *48 event timer del: 6: 1438271630291

2015/07/30 16:52:50 [debug] 5064#0: *48 reusable connection: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 http upstream temp fd: -1

2015/07/30 16:52:50 [debug] 5064#0: *48 http output filter "/cgi-bin/page.cgi?"

2015/07/30 16:52:50 [debug] 5064#0: *48 http copy filter: "/cgi-bin/page.cgi?"

2015/07/30 16:52:50 [debug] 5064#0: *48 image filter

2015/07/30 16:52:50 [debug] 5064#0: *48 xslt filter body

2015/07/30 16:52:50 [debug] 5064#0: *48 http postpone filter "/cgi-bin/page.cgi?" 00007FFF5C5525D0

2015/07/30 16:52:50 [debug] 5064#0: *48 http chunk: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write old buf t:1 f:0 00000000009CA978, pos 00000000009CA978, size: 162 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write old buf t:1 f:0 0000000000A1F010, pos 0000000000A1F010, size: 3 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write old buf t:1 f:0 00000000009CFBB0, pos 00000000009CFBEB, size: 15 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write old buf t:0 f:0 0000000000000000, pos 00000000004B2EBD, size: 2 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 write new buf t:0 f:0 0000000000000000, pos 00000000004B2EBA, size: 5 file: 0, size: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 http write filter: l:1 f:0 s:187

2015/07/30 16:52:50 [debug] 5064#0: *48 http write filter limit 0

2015/07/30 16:52:50 [debug] 5064#0: *48 posix_memalign: 00000000009D0D60:256 @16

2015/07/30 16:52:50 [debug] 5064#0: *48 malloc: 00000000009E5690:16384

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL buf copy: 162

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL buf copy: 3

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL buf copy: 15

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL buf copy: 2

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL buf copy: 5

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL to write: 187

2015/07/30 16:52:50 [debug] 5064#0: *48 SSL_write: 187

2015/07/30 16:52:50 [debug] 5064#0: *48 http write filter 0000000000000000

2015/07/30 16:52:50 [debug] 5064#0: *48 http copy filter: 0 "/cgi-bin/page.cgi?"

2015/07/30 16:52:50 [debug] 5064#0: *48 http finalize request: 0, "/cgi-bin/page.cgi?" a:1, c:1

2015/07/30 16:52:50 [debug] 5064#0: *48 set http keepalive handler

2015/07/30 16:52:50 [debug] 5064#0: *48 http close request

2015/07/30 16:52:50 [debug] 5064#0: *48 http log handler

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 00000000009CFBB0

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 000000000097BB30, unused: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 00000000009C9AC0, unused: 0

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 0000000000A1EE40, unused: 3071

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 00000000009B6230

2015/07/30 16:52:50 [debug] 5064#0: *48 hc free: 0000000000000000 0

2015/07/30 16:52:50 [debug] 5064#0: *48 hc busy: 0000000000000000 0

2015/07/30 16:52:50 [debug] 5064#0: *48 free: 00000000009E5690

2015/07/30 16:52:50 [debug] 5064#0: *48 tcp_nodelay

2015/07/30 16:52:50 [debug] 5064#0: *48 reusable connection: 1

2015/07/30 16:52:50 [debug] 5064#0: *48 event timer add: 4: 65000:1438271635303

Any ideas / suggestions?

Fortunately this is only my dev linode, but I'd like to try and get it back online (without having to revert to the image I made prior to the upgrade).

FWIW - it was working perfectly before I did the upgrade :) (I know I had fun and games getting Perl working the first time around though)

TIA

Andy