Hey, thanks for the update!! It's terribly frustrating to get error messages when trying to participate in group IM/Chat, but I'm sure you, and tons of other SL Residents, already know this.
It does help to know that LL is working on it. I wish I had more technical experience and could help them with exploring/testing possible solutions, and implementing a fix on the grid.
In the meantime, I guess we'll all simply have to be patient.