Bugs I've encountered so far:
- The bug that generates all random characters of certain cultures with the same name, e.g. I had a Serbian peasant revolt yesterday, the leader and his entire court was named Martin.
- The bugs with the Mediterranean portraits introduced in 2.2 still persist: enlarged and misaligned eyes, ghostly beards and whatnot.
- Misaligned mouths in Western portraits.
- Orthodox councillor models are replaced with vanilla Western councillor models for Orthodox heretics since 2.2.0.2.
Finally, not sure if it's a bug or intended, but as the Byzantine Empire in 769, my vassals converted the entire Empire save four provinces to Iconoclast before 779. (I did no converting, because I was trying to get rid of Zealous so I could switch back to Orthodox to get the councillor models right.) Sure, Orthodox lacks a religious head, locking its moral authority at 20%, while Iconoclast in that time rose from 50-something MA to almost 80%. Still I've never experienced such fast conversions while playing earlier versions. Not even when trying to convert a Sunni province (17% MA) to Orthodox (>100% MA) in 2.1.6. Now I get a "province converted" message from my vassals' bishops once or twice a month.