For me the CodePage registry setting seems to be ignored. I've posted a comment to this effect in the bug tracker (bug 1101625), but I was wondering if anyone has been able to get it to work with utf8.
Using ext2fsd 0.23 on Windows XP SP2.
I've been having similar problems myself (and filed a bug report about it, as well). It seems that regardless of the codepage setting, programs such as Windows Explorer still interpret the strings according to the current Windows codepage, resulting in mangled strings.
Sorry I don't have a solution - nice to know I'm not the only one out there though :)
Looks like we have an answer: install 0.24
Many thanks to everyone behind this wonderful driver! ^_^