Annoying error dialog

I'm getting an error dialog popping out every now and then saying "javaw.exe - No Disk" "There is no disk in the drive. Please insert a disk into \Device\Harddisk\DR2".

It started to appear after I assigned some .png images as concept icons and used image nodes in concept editors.

This is reallly really annoying.

Also, at the beginning of the log there's always

2010-01-19 17:49:43,549 [   1648]   INFO - #com.intellij.openapi.vfs.impl.local.FileWatcher - Native file watcher failed to startup.

Using MPS1.1 on WinVista 32bit. Didn't mess up with installation..