Bug 775 (http://www.reactos.com/bugzilla/show_bug.cgi?id=775) seems to be a simple application bug. I expect no kernel involvement at all. So, if you were always wanting to fix something in ReactOS but were afraid it might be too complicated, this bug is for you. It should give you experience in building and debugging ReactOS so maybe next time you can attack something a little bit more complicated.
Gé van Geldorp.