PNG and SWF support

I have installed Centos 6.2(32 bit) to my linode and updated it. Installed apache,php and mysql with phpmyadmin. All working well.

Accept when I upload a png image via ftp it doesnt show on the page. I download the uploaded png and try to open it. It says unknown file type.

I used 3 different ftp programs with ascii and binary mode still no luck. Then I used wget to download the png from another server. Still png is corrupted.

Same with flash files with .swf extension.

Then I installed fedora no luck, ubuntu no luck. Still no png support. I went back to Centos.

I dont think it is an apache issue. Somehow linux corrputs the file that is uploaded.

Any suggestions to solve this appreciated….