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Problem with Lightning Rated 3 out of 5 stars
Very good Tool!
But there are problems in combination with Lightning (Win7 Home Premium / Thunderbird 7.0.1 / Lightning 1.0b7). Lightning and Extra Folder Colums result deactivated menues and context menues for lightning (grey without funktion).
Addendum: The Problem appears only in combination with Adblock Plus 1.3.10. When I deactivate Adblock, everything is alright.
Standard8: You are right!
I've been using that combination just fine. You may want to check there isn't a conflict with a different extension.