Unchecking block guild invites doesn't work until you relog (at least).

[Arek75]

WoW Freakz link: N/A

Bug description: If you have "Block Guild Invites" checked in your client, and you uncheck it so that you can join a guild, you still cannot receive guild invitations until you relog with the box unchecked. I had this happen last night (or this morning, server time) and had to relog before I could be invited to a guild.

Proof: Don't have any atm, but the bug should be reasonably easy to reproduce. Regardless, it's a low-priority bug that I'm mostly posting about as a heads-up to other players who turn this option on to let them know that they have to relog after turning it off to actually get it to turn off.

--Arek75