Gmod crashing :(

When I join any server, after 5 minutes of playing my Gmod crashes. Others’ Gmod crashes too. Who has the same problem?

“Latest GM12 update broken?” http://www.facepunch.com/showthread.php?t=1205588
“Crashing while loading map” http://www.facepunch.com/showthread.php?t=1205585
“Gmod Crashing” http://www.facepunch.com/showthread.php?t=1205636