Last night, I was running Firefox and plugged a USB pen drive into my computer to retrieve a file, however then computer for some reason displayed a Blue Screen of Death Memory Error and restarted. Everything now works fine with the pen drive so I can only assume it was a one off, but Firefox is now acting strangely when it comes to themes and personas. Upon opening Firefox after the restart, my usual persona was not displayed, instead it was totally white. I changed it to another persona and the same issue, just a solid colour (it changes from white to blue, black, etc) was displayed. I checked a few options in Firefox and made sure the Persona sites were added to to privacy exceptions - they are. A few restarts of Firefox later and the Personas started displaying again. I've now been on Firefox a few more times and sometimes the Personas display fine, other times it just displays a solid colour. I've tried removing my userChrome file from the Firefox profile and this did nothing. I know its nothing major but I hate it when a problem starts (no matter how minor) and I can't resolve it). Can anyone advise? I'm running Firefox 10.0, Windows Vista Home Premium SP2