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Rated 4 out of 5 stars
when it's not displayed on addon-bar,hide the addon-bar then mouse over the icon it would not show up the information.This review is for a previous version of the add-on (1.3.20110715.1-signed).
It's a long time outstanding problem. See:
UPDATE 2011-11-18: Now fixed and available in a new release - 1.3.20111118