I had an issue with the installation as seen in the technical problems thread about "not being able to connect". The same solution worked, however, the repair-build function broke my install so I had to fool MWLL into thinking I rolled back to 0.5.1 by editing an XML file to get it to reinstall 0.5.2.
Also, there appears to be an issue with selling tanks. They don't return nearly as much as they should.