I tried 2.2, but at least for half of my .chm books, I get the following error when I try to open them:
Can't get buffer for file
:

ataSpace/NameList
Can't fnd entry for file
:

ataSpace/NameList
This is not related to memory problems, because some 10mb+ chm books open perfectly fine, while other 5mb chm books cause the problem.