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It's such a great addon, but it stopped working some days ago. When I hit reply or forward, the signatures don't look as they should anymore. Lots of empty lines, also it looks like HTML paragraph when I hit return or backspace (as more than one new line is created or more than one line is deleted). Also some stuff of my signatures is missing...
When I deactivate the addon everything looks ok with these new lines and deleting lines with backspace. But for sure, no signatures at all.

Это отзыв для предыдущей версии этого дополнения (1.3). 

.. on our support site:
http://smarttemplate4.mozdev.org/bugs.html
there is also a link to contact us directly on the bottom of the page