Firefox Flash crashes when switching tabs

[Goulou]

Binary package hint: firefox-3.0

I opened those 2 pages in different tabs :
http://www.nasa.gov/externalflash/apollo11_landing/index.html
http://www.nasa.gov/externalflash/apollo40/
(Well, not very surprising given the date... :-) )
They both contain a flash application, which works well, unless I switch tabs : the page is then filled with a gray area, at the place where the flash app were, in both tabs...
I don't know if it is related to flash plugin, or to firefox, but it is quite annoying...

Note that hitting refresh reloads the page, and the flash app works again until I switch tabs

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
NonfreeKernelModules: nvidia
Package: firefox-3.0 3.0.11+build2+nobinonly-0ubuntu0.9.04.1
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: firefox-3.0
Uname: Linux 2.6.28-14-generic x86_64

[Will (oberman)]

I have a similar issue, but when the flash goes gray, /var/log/kern.log has activity:
-----------
Jan 18 11:01:08 xxx kernel: [354052.811194] npviewer.bin[17760] general protection ip:13695bc sp:bfd95fd0 error:0 in libflashplayer.so[ff7000+993000]
Jan 18 11:02:37 xxx kernel: [354141.905863] npviewer.bin[18427]: segfault at 13 ip 06b66e57 sp bff1fb04 error 4 in libflashplayer.so[648a000+993000]
Jan 18 11:07:15 xxx kernel: [354420.153263] npviewer.bin[18506] general protection ip:12b35bc sp:bf8fc980 error:0 in libflashplayer.so[f41000+993000]
Jan 18 11:16:55 xxx kernel: [355000.135475] npviewer.bin[18574] general protection ip:456a5bc sp:bfec3cc0 error:0 in libflashplayer.so[41f8000+993000]
Jan 18 11:21:27 xxx kernel: [355272.290025] npviewer.bin[18749] general protection ip:431d5bc sp:bfba46a0 error:0 in libflashplayer.so[3fab000+993000]
Jan 18 13:44:44 xxx kernel: [363869.301508] npviewer.bin[19060]: segfault at 13 ip 016d0e57 sp bfbae2d4 error 4 in libflashplayer.so[ff4000+993000]
Jan 19 09:02:44 xxx kernel: [433347.050881] npviewer.bin[19705]: segfault at 13 ip 01702e57 sp bfee77d4 error 4 in libflashplayer.so[1026000+993000]
Jan 19 09:28:57 xxx kernel: [434920.609975] npviewer.bin[22941] general protection ip:40da5bc sp:bfd005e0 error:0 in libflashplayer.so[3d68000+993000]
------

I'm running Ubuntu 9.10 + i686 + 2.6.31-17-generic + firefox-3.5 + flashplugin-installer. I'm new to commenting here, so any other information required (or a different reporting style), please let me know. I found this bug when googling on my problem.