chrome quit, won't restart

[jackson byers]

$ uname -r
2.6.35.14-97.fc14.i686.PAE


chrome suddenly quit; no response to clicks on icon

trying manually:

$ /opt/google/chrome/google-chrome &
[2] 4311
$ [4311:4311:95679337296:ERROR:process_singleton_linux.cc(250)] Failed
to unlink /home/byers/.config/google-chrome/SingletonLock: Read-only
file system
[4311:4311:95679337571:ERROR:process_singleton_linux.cc(265)] Failed
to create /home/byers/.config/google-chrome/SingletonLock: File exists
[4311:4311:95679337706:ERROR:process_singleton_linux.cc(250)] Failed
to unlink /home/byers/.config/google-chrome/SingletonLock: Read-only
file system
[4311:4311:95679337746:ERROR:browser_main.cc(1650)] Failed to create a
ProcessSingleton for your profile directory. This means that running
multiple instances would start multiple browser processes rather than
opening a new window in the existing process. Aborting now to avoid
profile corruption.

[2]+  Exit 20                 /opt/google/chrome/google-chrome


I then rebooted, and chrome came up as usual.

advice?

Jack