synchronization problem

Hi,
I have a little problem with the synchronization feature. I installed 
mozilla (1.2.1 now), updated xmlrpc and installed mozblog (6b2).
When I pushed the button to synchronize, it shows "Get 1 recent 
posts..." and never returns (I used only one message for testing). I can 
post and delete messages correctly.

I first thought it to be a server-side problem (because I use tiki 
instead of blogger, and it worked well with other tools) so I started 
ethereal to see what's happening:
1. request (HTTP POST: methodcall blogger.getRecentPosts with parameter
    1, user and pass)
2. reply (HTTP 200: the whole message packed into a methodresponse with
    postid
3. connection shutdown (client->server: fin, ack....server->client: ack)

I think this does look quite alright, doesn't it?

Does anyone have a solution or an idea where I could start looking for 
the error in the code (mozilla, xmlrpc or mozblog).

Thanks in advance,       Joerg