Browser issue Editing message backspace cursor jumping to top right corner

[AndyB]

The cursor jumps from the last line to the top right corner. Steps to reproduce:

1) Create a new message as shown in the picture below.



2) Edit message and place cursor after the Line4.
3) Backspace until the beginning of the line.

Notice how the cursor jumps to the top right corner. I'm on a Mac (10.8.4) using Firefox (22).

 

[chulapi]

Can't reproduce this at all with Firefox 22 (Windows).

 

[AndyB]

Chrome and Safari on my Mac work fine. Must be a Firefox on Mac issue only.

 

[Mike]

I can actually reproduce this in FF in Windows. Cursor positioning is basically entirely down to browser rendering. In this case, it may be an issue specific to editors that are absolutely positioned. Very little we can really do about it though.