I have several E50 & E65 and when i install another screensaver not run always, several times run default screensaver and my screensaver not run.
I test another screensaver as LargeTime or TY1 and the same bug appear.
I think that is a bug in serie EXX but the same screen saver work fine in N73 or N80.
My firmware version is last, 06.41.3.0 and is free, nokia genuine
Application was instaled in telephone memory, i heard that if application was instaled in memory card error don't appear any can confirm this ?