Found these on Aminet:
Update Os 3.9 BB2 Shell to 45.11:
"This patch fixes some bugs of the 45.7 shell that was published with BB2."
Unofficial patch for the 45.13 FastFileSystem (3.9 BB2):
"The FastFileSystem shipped in OS 3.9 BB2 (V45.13) has a bug in the disk validator code. A memory buffer that is allocated for the validation is later freed with a wrong smaller size, causing a memory leak as well as a mismatched FreeMem() report from debugging tools like MuGuardianAngel and MungWall."
...I'm starting to get the impression that BB2 was released in a hurry and/or untested.
Oh, and to answer elendil's question:
(from the H&P wesbite):
"Boing Bag 3.9-2 contains many bug fixes, small enhancement and new features in the areas multimedia (AMPlifier, PlayCD, sound datatype), shell, Workbench (Find, AsyncWB, UnArc, XAD v10), ReAction and harddisk support."