Weird!?

[mudi]

No files larger then 500 kb can upload. I mean they upload fine, you can even see the thumbnail, but when you try to place them in album, you get white screen. When many attempts are made the gallery crashes, and then nothing can be uploaded. I have figured out how to fix it, I have to delete and recreate the edit folder. But any user can crash my gallery accidently or purposely. However one file that is 650 kb did upload!? But no other ones would anymore. Look for yourself.
http://balkanci.org/mudi/cpg132/displayimage.php?album=lastup&cat=0&pos=0
And no, it is not my php settings, that is set to 2 mb
And yes, I did change configuration, it is set 1.5 mb

My website is about photoshop, and large files are really important. Plz help.