User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36 Steps to reproduce: OS X, Thunderbird 45.3 1. Enable "check spelling before sending" 2. Compose email with spelling errors. 3. Click Send Actual results: The message windows lost focus as if the spell checker appeared, but the windows offering spelling corrections did not appear. I could click on the compose window, but the cursor did not appear. The message window would not allow itself to be closed. Removing the misspelled words allowed me to click send and send the message. Expected results: The spell check window should have come up.
OS: Unspecified → Mac OS X
Hardware: Unspecified → x86_64
WHat percentage of cases does spell check not appear? Does problem go away if you start Thunderbird in safe mode, or use beta from http://www.mozilla.org/en-US/thunderbird/channel/ ?
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