Comment Network Maintenance (Score 1) 881
The bug was caused after a new Counter Strike Source update. Because of some errors in the new patch, some servers kept their client connections open, thus resulting in major ping. There have also been a lot of complaints regarding a major decrease in fps in the latest patch:
http://forums.steampowered.com/forums/showthread.p hp?s=b58a63a6e734c3ed65c4b2798470af19&threadid=231 393