I made some patches to Yappari 1.1.46, this is the changelog:

• Message notifications with group name instead of sender name
• Anti-battery drain patch
• Added UTF-8 codes for some emoji with softbank encoding. (before I received a square from contacts that uses windows phone, looks like it uses the new utf8 encodig)

Here you can download a deb package, and here the source code.

I think this can solve some problems posted recently.