When using Zorin OS 6 in Windows 7 mode, sometimes the Zorin start button will become unresponsive to a left mouse click. Left clicking the start button multiple times will also cause this bug to occur. (see fig. 1)
|fig. 1 -- Zorin OS Start Menu Button Bug|
However, you can still perform a right mouse click on the Zorin start button. Select Preferences and click the OK button. A prompt will be displayed asking "Menu needs to restart, restart now?". Click the Yes button. The blue Zorin start button will then change to a sad smiley face and then a message appears saying "Whoops! The applet has crashed. Click to restart it.". Click the sad smiley face and the blue Zorin start menu button will reappear and will be responsive once again to a left mouse click.
This is a bug the Zorin developers definitely need to fix.