John, you're absolutely right. I created a new profile and the image preview worked perfectly.
However, I was unable to discover what was causing the error in my previous profile - disabling every extension/plugin didn't solve the issue, but that's OK. Thanks! -- You received this message because you are subscribed to the Google Groups "Firebug" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/firebug?hl=en.
