it was confirmed with lfs viewer S2 S alpha.

What kind of bug report is that please?
NOBODY has even a lic of an idea what you are talking about...

So please try to explain what the problem is

Scawen does.

and for those who don't. when mouse clipping is enabled, we can still resize the window.

Hi there...
I know it's kinda late, but i'm just trying my luck with mouse and finding that issue hardly annoing, so here's temporary (I hope) fixup for mouse handling in lfs.

http://www.mediafire.com/?dkg0x6sabxl
Just start lfs_mfix.exe and it should work from scratch.