Thunderbird 45.5 email client released

A new version of the popular desktop email client Thunderbird has just been released. Thunderbird 45.5 fixes several issues but does not introduce new features.
The Thunderbird 45.5 release notes list six items of which two are marked as changed, and four as fixed.
The new release is a bug fix release mostly; it does not fix any security issues or introduce new features. In fact, it brings back the behavior of Thunderbird 24 for a feature.
Thunderbird 45.5.0
Probably the biggest change is a return to Thunderbird 24 behavior when it comes to address entries in the email client.
IMPORTANT: Changed recipient address entry: Arrow-keys now copy the pop-up value to the input field. Mouse-hovered pop-up value can no longer be confirmed with tab or enter key. This restores the behavior of Thunderbird 24.
You may have difficulties finding out what changed exactly just from reading the note. Basically, what the change does is the following: that the selected suggestion (via arrow keys), is the same as the filled value in the email client's recipient field.
Thunderbird displayed different values for filled and selected items up until now (after the release of Thunderbird 24 to be precise).
Two different terms are used when it comes to the recipient field in the email client:
- Filled value, which is the value that Thunderbird displays in the To, BCC or CC fields.
- Selected value, which is the value that is selected in the list of address suggestions.
These values could have been different in the past, and that is what Mozilla fixed. Hovered items can no longer be selected with the Enter or Tab key.
Check out this bug on Bugzilla@Mozilla for additional information.
Other Thunderbird 45.5 changes
- Support changes to character limit in Twitter
- Reply with selected text containing quote resulted in wrong quoting level indication
- Email invitation might not be displayed when description contains non-ASCII characters
- Attempting to sort messages on the Date field whilst a quick filter is applied got stuck on sort descending
- Mail address display at header pane displayed incorrectly if the address contains UTF-8 according to RFC 6532
You can check out the full release notes for Thunderbird 45.5.0 here.
Thunderbird 45.6.0
A new version of Thunderbird, version 45.6.0, was released on December 28, 2016 to the release channel.
The update fixes an issue where the system integration dialog was shown every time Thunderbird was starting.
Several security issues are fixed in Tunderbird 45.6.0 on top of that.
The release notes are available here.


You said that Outlook isn’t your main email client, so which is your main one?
I think its thunderbird
It is Mozilla Thunderbird.
Awesome! This actually solved my problem… what a stupid bug.
If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.
THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!
Solved my issue! 6 years later and this is still problem…
Fantastic. Thank you. Size did the trick.
This solved my Outlook problem, too. Thank you. :)
Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.
You are a god – thank you!
thanks a lot…. work like charm.. :-)
Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers
Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
Thank you
Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)
Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.
I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!
Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007
Great tip! Thanks!
Worked for me, too – thank you!!!
It’s Worked for me, too
thank you very much!
I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!
Thank you so much. Solved!
Considering you published this in 2012, incredible not been debugged by Microsoft.
Thank you again. M
This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.
Thanks.
Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.
Thank you, this worked !!!!
Man, you are a fucking god. Thanks a lot, what an annoying bug!!
Awesome, this post solved the issue. Many thanks!