confusing keyboard navigation on FF on Mac?

Hi folks,

I'm using FF 2 on a mac (os x 10.4) and I've run into a slightly confusing keyboard navigation issue.

Normally, while editing in a text area, I can press the CMD-back arrow (also known as "open-apple, left-arrow") to move my cursor to the beginning of a line. In fact, it does it just fine in this forum text area.

In the FCK editor (see latest build: http://www.fckeditor.net/nightly/fckeditor/_samples/default.html) the "open-apple, left-arrow" will navigate you one page back in history. NOTE, this only occurs if you actually have history. If there is no history, it seems to do the correct thing and move your cursor to the beginning of the line.

Navigating back in your history is actually the correct browser behavior, except when you are doing some text editing.

I've searched in the forums about keyboard interaction, but didn't find anything about this specifically or much about overriding key combinations. I'm new to the forums here, so perhaps my search-fu is weak. any pointers?

Anybody have any ideas for making this editor consistent with mac keyboard browsing? (yup, we've got lots of mac users!)

Thanks in advance for any advice.
And btw, thanks so much for providing FCKeditor. it's great!!

Sarah