[TxMt] Scroll Line down. Bug?

[Charilaos Skiadas]

Just wondering if anyone else has experienced this. When I use the 
scroll-line-down feature (Control-Command-DownArrow), it will not 
switch the highlighted line with the last line of the text.
I.e. if  the text has 10 lines, and line 9 is highlighted, 
scroll-line-down has no effect. Can someone confirm this? If so, is it 
the expected behavior, or should I file a bug, or is a bug already 
filed?
(v1.1b5)

thanks,
Haris