sorry about the delay.. for some reason, I did not get any notification about this post. The micropanel works fine for me. Is it a specific website on which it doesn't work? (addons.mozilla.org is not allowed for example) Have you tried using a different method to show the micropanel? Like rocker gestures, quick click or context menu? What OS are you using?
If everything fails, would you be willing to try some things to find the source of the problem? like test the add-on with a fresh browser profile, to see if it might be some setting or another extension conflicting with this extension.