Just installed updates in Ubuntu 12.04 and it started happened to me
too.
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https://bugs.launchpad.net/bugs/736027
Title:
Gnome-screensaver black screen
Yeah. The funny thing is that I had no crashes since bugreport (on
playing podcast, but I had them on something else if I remember
correctly).
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Public bug reported:
When I play podcast rhythmbox crashes on random moment. Rhythmbox
version is the one that ships with Ubuntu 11.10 with latest updates for
today. 2.90.1
*** glibc detected *** rhythmbox: double free or corruption (!prev):
0x7f9d3c4842a0 ***
=== Backtrace: =
