1) There are more translations: currently there's italian, czech, spanish,
german, hebrew, polish and english
2) There is a new plugin system, so now you can hack marave without getting
your hands dirty with main.py ;-)
Check a short explanation here:
http://lateral.netmanagers.com.ar/weblog/posts/BB872.html
3) Syntax highlighting for many many languages, using GNU source highlight. It
may be a bit hard to make it work, since it needs several other packages
installed.
If you are in Arch linux, it's on AUR and it works.
4) Several bugs fixed.
I intend to do a 0.6 release probably tomorrow, so it'sa good time to test :-)