www-plugins/lightspark-4.5-rc1 was released today. Reproducible: Always
Some info from release announcement: Packagers should pay attention to fulfill the following dependency requirements: Libxml++ version 2.33.1 or better. If an older version on libxml++ must be supported some commits must be backported. More info about this in the README file Mesa should include the fix for this bug (http://bugs.freedesktop.org/show_bug.cgi?id=31827). The issue affects some radeon and maybe intel cards.
lightspark-4.5 final has been released !
Fixed in CVS.