Looks like it's related to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=702715
I ran thg using the following command: THGDEBUG=1 thg and got the following output: THGDEBUG=1 thg TortoiseHg requires Qt 4.6 and PyQt 4.7 You have Qt 4.8.2 and PyQt 4.10.1
