Since PR1.1 using GTalk is almost impossible.

It takes several tries to login (always asks for password again and again...). When you are finally able to login it behaves strange.

You do get messages on feed screen and audio notification like it was before. But when you open that conversation, you don't see the message. You can write there and your chat partner can read what you send. But when he types again nothing happens, no audio notifiacation, no text in conversation screen. You have to swipe away or close the conversation screen to get messages again. They then show up on feed screen and plays audio notification again. When you change back to the conversation window, it shows only what you have typed.

I deleted the whole Google Mail account and setup it again, but this did not help.

Seems this also happened on N950 with PR1.1 --> http://talk.maemo.org/showthread.php?t=79023&page=11