No ideas any more--also the last patch does not work (Helge's private reply).
I've reverted the first patch, http://www.lyx.org/trac/changeset/18376 because it introduces this bug, http://marc.info/?l=lyx-devel&m=117944188219722&w=2 detected by Dov. The event_1 patch gives better results on systems with a fast enough graphic card(?) but does not work an older systems. Jose feel free to do what you want. Peter
