As some of you already know, Valve currently has a rather large (internally) update to CS:GO planned to release next Wednesday (2013-01-23). This will be very similar to the breaking (for us) update that was released on Christmas Eve and subsequently rolled back a couple of days later.
In addition to requiring a new SM 1.5.0-dev snapshot after the update, some SM plugins will need to be updated as well if they wish to retain compatibility with CS:GO, particularly any plugin using the BfRead* or BfWrite* natives in bitbuffer.inc to read or write usermessages. More info about that can be found on the wiki,
http://wiki.alliedmods.net/Protobuf.
While our update for this is just about ready, we're intentionally waiting on making new builds with support for it as to not confuse current CS:GO users. We will let you know when these are available. At the latest, it will be shortly before the update hits.
The CS:GO team has went out of their way to try to help us and other plugin developers prepare. Hats off to them.
After the dust settles from this update, we hope to finally be able to wrap up a final SourceMod 1.5.0 release within a few weeks.
Update (
2013-01-22): The changes for this are now in SourceMod dev snapshots. For more info, including extra tips on porting plugins, see
this post