Anyone else having problems re missing messages on Cepi's version?

Particularly with group chats although it does seem to happen for individual chats too. Some of the messages will never reach me, and the other guy will see it as not delivered (one tick mark on official client, not two).

I think it may be that it only receives messages when actually connected all the time. For example if I don't have 3G/wifi enabled and someone sends me a message I won't get it, but if I'm connected I will get it just fine. When it connects it doesn't seem to fetch all previously sent messages.

Anyway thanks for all the hard work, it's working great otherwise!