For the past four weeks or so *at times* when I reply to a post my profile keeps coming up. It is happening now. I am using FF 10.0.2 (the latest version) exclusively on WIN-7. I am 100% updated on all software and add ons.
This is a long-running issue, but fortunately easy to work around (see http://chowhound.chow.com/topics/8299... for details). This problem has been back on our radar recently, and we hope to have it fixed for good in the foreseeable future.