Did this just start with version 38?

Does problem go away if start in safe mode? - http://support.mozillamessaging.com/en-US/kb/safe-mode

No, it started right from day one (one or two years ago when first installed it), regardless of the version or operating system.

I didn't check if this bug is not appearing when starting the operating system in safe mode. I'll check...

Thanks.

I can't find any bug reports, open or closed, that describe this. I'll try to find someone to help.

I take from that there aren't a lot of Thunderbird users who also write from right to left... Anyway, I appreciate this. I'm sure solving this issue is a piece of cake for the developers.

Good luck.

Before I persue this futher, what are your results in safe mode please?

I just verified this in safe mode. no change in behavior. same result-all punctuation mark move to the right when I end a row.

A developer indicates this problem is https://bugzilla.mozilla.org/show_bug.cgi?id=1177505

> A developer indicates this problem is https://bugzilla.mozilla.org/show_bug.cgi?id=1177505

Bug 1177505 was fixed in Firefox 42. So you should find this fixed in Thunderbird 45.