I've set up MT v.2.64 with Perl 5.8.0 and Apache 1.x on Windows (XP). In mt.cfg I chose utf-8 as the default encoding.
Unfortunately mt.cgi does not always display Unicode characters correctly. In the navigation bar (i.e. Main Menu > Blog Name in Unicode > ...) they show up correctly. In form fields and other places they end up as HTML entities (i.e. &entityname;).
So, for example, blog texts entered in Unicode show up correctly in published pages. In the database tables they look fine, as well. When these are edited in MT, however, they've all been corrupted to HTML entities.
Since Perl 5.8.0 added lots of Unicode enhancements (but may have bugs as well), I'm wondering if that's the problem? I've used a utf-8 installation running 2.63 and Perl 5.6.x and it all works out fine (though since it's not my installation, I can't say if additional hack work was done to make it so).
Any insight appreciated.