[mk craig 42]

Originally Posted by kh99

Well, googling the error (which you may already have done) unfortunately only tells me that a lot of people have the same problem. A couple things, you might increase the php time limit if it's low, and also if you have access to the server error logs maybe look in there to see if there's any more info on that error.

Yea, I tried googling, and found nothing in terms of a possible fix to this.

In my error logs are just errors for when I tried to install custom http error vB generic shell templates, which didn't work.. Aside from that, nothing.
My whole forum is based on uploading attachments.. So without even being able to upload a filesize larger than (it seems) 100KB.. I can't really do a lot.

Originally Posted by nerbert

Check Options > Message Attachment Options > Limit Space Taken Up By Attachments (Total)

But I can't imagine having this set too low would cause a server error

It's set at 0
as well as attachments per post
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EDIT

Just saw this in my error log

[Fri Jan 20 13:07:01 2012] [error] [client xx.xxx.x.xx.x.x] File does not exist: /[mypath]public_html/forum/images/attach/mp4.gif, referer: http://[myURL]/forum/newattachment.p...3b7560430f3849
[Fri Jan 20 13:07:01 2012] [error] [client xx.xxx.xxxx.x.x.x] File does not exist: /home/[mypath]/public_html/forum/images/attach/rar.gif, referer: http://[myURL]/forum/newattachment.p...3b7560430f3849
[Fri Jan 20 13:07:01 2012] [error] [client xx.xxx.x.x.x.x.xx] File does not exist: /home/[mypath]/public_html/forum/images/attach/avi.gif, referer: http://[myURL]/forum/newattachment.p...3b7560430f3849