On Sat, Aug 12, 2017 at 09:53:55AM +0100, Don Alex wrote: > Can confirm. Initial rending of windows appear blank but when rolling mouse > over it artifacts begin to be drawn. Makes Thunderbird unsable. However when > running the official Mozilla build > > http://download.cdn.mozilla.net/pub/thunderbird/releases/52.2.1/linux-x86_64/en-GB/thunderbird-52.2.1.tar.bz2 > > on the same system, no such errors occur. Suggest you compare the two builds > and discover what has changed.
That's quite easy to compare, Mozilla is still using GCC-4.x in their toolchain. Such issues are not happen for the first time while Debian is changing the GCC suite. Regards Carsten