In Mac systems, not just Lion, the text formatting such as color and font options are copied/pasted along with the text unless you add an auto-enter calculation such as:
TextFormatRemove ( Self )
To strip out the formatting.
Windows Xp systems limit pastes of copied text to unformatted text, so you do not have this issue in XP systems. I'll have to check my new Windows 7 system and see if this is also the case in it...
Thanks for your answer. But are you sure about this?
The user claims that it didn´t behave like this before he installed Lion.
Yes. If you search this forum, you'll find many posts that discuss this issue and which recommend this solution.