I tried searching for a similar issue but couldn't find one so here goes.
GTalk is really wonky/unreliable on my pre. Basically I can't be logged into it and on my pc at the same time like I could with my blackberry, Granted the BB is a native gtalk app, I've accepted that this just isn't possible.
The real issue is that I use the pc client at work as it is more convenient for me than the phone. I log out of gtalk on the pre and then log into gtalk on the pc. Everything is rainbows and smiles all day long. Now when I log off of the pc gtalk and into the pre, no message I send are received and I don't receive any from anyone. It doesn't say it failed or anything it all looks normal. Same for the people who send me a message. Only way to resolve it is to reboot my phone. So I've accepted that fate for now and reboot my phone everyday after work and that seems to work fine, just wondering if anyone else has experienced this issue.
Final issue is the status colors for my gtalk contacts no longer update either. My wife is always showing as busy/unavailable even though she is set as available on her blackberry. And other people who set themselves as busy during the work day do not show up as such.
I'm hoping this is addressed in 1.2 but I doubt it. Let me know if anyone else has experienced anything like this.