Windows 98 First edition. There's too many modules and themes to list. Well first of all i have 6 stable themes installed, out of 30 others i've tryed and ended up having all sorts of module errors, they haven't always been so critical as to force LS to shut down but sometimes LS seems to just give up after too many module errors. The module errors are mostly about missing values, "Unable to find variable..." etc. errors about missing components, even some with missing modules. This only occurs with themes for which the ThemeInstaller downloads additonal modules for and the installation of these themes goes smoothly, except for this ONE time it failed to unzip this jcde module the MacOS theme uses. Of recent attempts the KDE theme caused errors on theme switch. But i've never had any problems running on Austerity. :)