I never had any problems with the built-in version. But now that it's gone, I can't IM anymore from the Pandora. The sebt3's version freezes, often before I get a chance to send even one IM. And it's not the sound problem either, cause I disabled those.
I know you've lot's freezing. But you more or less seems to be the only one.
You complain a lots, yet I dont even know the protocol your are using.... Nor any other information that could be usefull to debug your issue.
BTW, my version have been available a long time before HF5. Did you repported your issue at this time so ED could have known that pidgin.pnd could have some bad issues ?