[scribus] Scribus 1.4.1 on Windows XP

[Richard Hall]

 >

Not sure why you would be holding down shift then using the
mouse, but it worked fine for me, either with click-drag or multiple
clicks to highlight variably sized areas. I even used Edit > Cut to make
sure it did indeed cut the selected text.
<

You hold down [Shift] and click with the mouse to do what is called 
"Shift Click", part of Windows since forever.

Click-Drag also highlights text and the "Cut" menu item is active.

Rick