Memory leak in Perl under UML?

I've been having a memory problem ever since I started using the Tenshi log monitoring program on my Gentoo Linode 128 server. It seems the Tenshi Perl process leaks memory (as seen with ps -eF):

Date        PID     SZ   RSS  Comment
2004-09-03  5881  1514  4356  just launched
2004-09-07  5881  5309 18152
2004-09-10  5881  7817  3508
2004-09-14  5881 11543 18424  end of experiment

Now, I've been discussing this with the Tenshi developers for a while and they haven't seen anything like this before. They use the program on some heavy duty machines with lots of logs without any memory leak problems like these.

After comparing our setups, it seems the only meaningful difference between theirs and mine is that I run under UML (here at Linode). Could this really be it? Have anybody else seen memory problems with Perl under UML? I haven't got any other of my server processes behaving this way (like apache2, ntp, etc). And it seems kind of silly to have to restart the log monitor program every few days…

Comments? Ideas? Questions?