Firefox and Find bar problem

All,

Every time I type an apostrophe character in the FCK window in Firefox, the Find bar at the bottom of the window (same thing as Ctrl + F) pops up.

Any idea what's going on? I haven't actually upgraded to the final final final version. I'm still using the Final Candidate 2.0 (last one before the final release). Was this fixed in the final final final version? Is it perhaps a conflict with a FF plug-in?

This behavior repeats on three computers.

Thanks!
Jake