I found that pointing the custom avatar section in the user control panel to a URL did not work. It gave some error about not being able to write to a temporary directory. Using the direct upload from my PC did work, though, I think
https://www.blackmesasource.com/forums/showthread.php?t=10
https://www.blackmesasource.com/forums/showpost.php?p=312&postcount=25
Was it a .gif?
Yes, it was a .GIF. I uploaded the identical file with the direct upload mechanism.
Well, no big deal It has a trivial work-around. Just thought I’d report it, since there’s a forum for the purpose.
this is a server related issue and shall be fixed real soon.