Sorry for the limited info, but I did not have time for a thorough investigation last night.
I have been updating my Ace mods via WAU pretty much every day before login. In last nights update something killed the confirmation windows associated with the Blizz UI(Release Spirit, accept Group Inv, accept Rez, etc..) and made it impossible for me to invite someone to a group. As long as my addons were enabled I would get an error stating "you are not the group leader" when typing /inv <char>.
WAU is the ONLY addon update I performed last night
I have a LOT of Ace addons so I use the standalone libs and update without externals
I showed no errors in Buggrabber)
It was raid time so I did not have an opportunity to disable one at a time to narrow it down
I will post more after I get home from work and can investigate a little, but I wanted to get it out there to see if anyone else had a similar problem.
Yep ... ran into the exact same problem. I just reverted to my backup (which I did before running WAU, like the friendly warning asks). And everything was fine. As it was during my raid I could not troubleshoot it then.
it might have been xloot, the author said he set the code up wrong so it was disabling all the pop up messages instead of just the ones he wanted to be disabled, but he said he fixed it, dunno when the push went through though.