No Enigmail menu items can be invoked
OpenPGP addon for Mozilla Thunderbird
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pbrunschwig
When invoking any of the menu items in Thunderbird's Enigmail menu, nothing happens. Thunderbird seem to work normally, but in this situation it is not possible even to open the menu again. After terminating and restarting of Thunderbird, the menu can be opened.
I suspect that you suffer from this problem: https://sourceforge.net/p/enigmail/forum/support/thread/d3cf983d0b/
Supposedly it is. I've got 4 keys with > 1 million signatures in it.
Done, everything is fine now! Thanks :-)