I don't know if you can do anything about the phpBB software regarding this, but this is my pet peeve with the forum website. I have this (hopefully not annoying) tendency to write rather long replies to posts -- hopefully in a helpful fashion! (I'm guessing you've all noticed.) I'm usually typing on my small notebook keyboard. I'll accidentally bump Caps Lock once in a while, which is no biggie. But if I accidentally bump TAB (moving focus out of the text edit box), then reflexively hit BACKSPACE to recover, I'm am bumped off the page, losing what I had been typing. Usually right before I 'finish'.... of course.
After cursing

, pounding my fist on the table, etc.

, I'll open up a text editor, re-compose my post (forgetting, of course, to retype something important that I lost the first time!), then copy, paste into the text edit box, and submit.
Is there any way to keep from closing the page and navigating back when I hit the backspace key outside the text editor when posting a topic or reply?
(Or should I just type shorter replies and/or take a typing course!?)
NO, that was NOT the start of a POLL!
Dale