Jens, thanks for the update. This new version almost works - it breaks looking for libhunspell 1.4, but I have libhunspell 1.6 installed.
Out of curiosity, what version of wxWidgets is this compiled against?
Never mind, I ran it and saw that it is compiled against wx3.02. Based on minimal testing, it looks like it all works except for the spell checking plugin (not exactly a surprise, since libhunspell is the problem).
Presumably I could load the earlier version of libhunspell and get it all working right, but for the moment I'll compile it against wx3.03 and see how it runs ...