Rediculous WIDTHS in posts?

Why do some of these posts have a rediculous WIDTH, while others seem well contained?

The first thing that came to mind was that maybe some people cut and paste from another editor (which may not be wrapping).

[HarryW]

This one seems fine *Shrugs*

[Ianpbaker]

if you use the code tags, it doen't force a new line unles you use the enter key

[HarryW]

The threads have been formatting strangely with no code tags involved though. Curiouser and curiouser, as Alice said.

[Guv]

It has also happened to me. At least once, the Thread was Okay when I returned later.

I often compose using Corel WordPerfect (Suite 8), and then Copy/Paste to the thread.

Could Corel WP be the culprit? If so, it has to be some specific feature of it. I use it often, and usually do not see the problem.

Why not post what you were doing when the symptom occurred. Maybe we can figure out what causes it.

[HarryW]

I compose straight into the form online, just plain text and VBCodes, so I don't think it's a cut-and-paste problem.

Harry
So you weren't cutting and pasting?...Weird.

Guv
You cut & paste, but it was okay later?...I don't know which one is more weird.

All
I think it happened to me once when I first started here and I definitely didn't use cut & paste.

It's just so annoying to try to read/reply to a fubar thread.

Perhaps an Admin can provide a solution?