I have a Rich Text Field with a hyperlink in it. When I select the entire field and copy -paste it into a a text editor or other software, the hyperlink gets lost. The same is true for other kinds of formatting, like bold, italic, etc.
The formatting only gets copied correctly if I go in to edit the field, and then select and copy the text.
I use Rich Text Fields and Scripts in order to generate hyperlinks in a field, but without being able to copy them, this is not so much use for me.