I get random lockups and freezes with MOS 2.0 on Efika 5200 (registered). After I installed the key file, I noticed an improvement in stability. Still, some window operations cause the system to freeze.

As a workaround, I disabled the dragging and resizing with full window contents options and enabled the maximize on title bar click option in IControl.
(this won't help with freezes during scrolling, however)

When I double-click on a dock icon, the machine freezes sometimes (freezes always in the Efika installer).

Was GCC used to compile MOS 2.0? If so, which version?