Damiën

How to reproduce this issue:
Play on a server that uses a lot of custom geometry models that use a custom human geometry for a long period.
After a while 2/3 hours the textures change to pink.
There isn't really an easier way.
It really does seem to happen randomly.
I've had this happen ALL (not sometimes just all the time) the time when I just stayed AFK for a few hours.
Daniel also posted something maybe usefull at the first of September.

I have the same issue I tried everything so its not an issue from your side tho.