Strange line breaks in Apple Mail
I keep encountering strange, unpredictable extra line breaks - or at other times the lack thereof - when composing email. I can't see a pattern to it, very frustrating, so I think the problem only occurs when I reply to or forward someone else's email, not starting fresh.
When I reply to an email - and even if I Select All text and remove all quoting (Option-Command-' as many times as necessary), I often see linespacing too tall between some lines. Even if I concatenate the two sentences and enter my own carriage return, there still is too much space between the lines. Then after I send the email and look at the message from my Sent box, there is no line break whatsoever where I thought I forced one. Or other times there are multiple linebreaks. Aaarrgghh!
So my workaround has been to copy & paste my bodytext into Apple TextEdit, then turn right around and copy it from there and paste it into a brand new email message. (If I delete all the text from my original email reply and paste it there, sometimes the weird line breaks still occur.)
It doesn't seem to matter whether I change my offending email reply or forward message from Rich Text to Plain Text; the problem still occurs.
Is there some Mail preference setting I can change to avoid this convoluted and infuriating procedure?
"June 2009" 17" MacBook Pro (5,2), Mac OS X (10.5.8)