Created attachment 92678 [details]
Screenshot of presenter console
Slides rendered 10% of the time on presenter console, main preview remains grey, next slide rendered OK, projection screen OK.
Happens with and without hardware acceleration.
Slideshow contains text + background images.
See attachement (screencap of presenter console).
Known bug, fixed in RC3.
Best regards. JBF
*** This bug has been marked as a duplicate of bug 73618 ***