-1. install 4.0.7
0. turn wordwrap on.
1. create 10MB text file in akelpad 4.0.7
2. install 4.0.9
3. load 10MB text file into 4.0.9
4. scroll up & down
note 100% CPU.
I've gone back to 4.0.7 for now
BTW the text file consists of
"0123456789" repeated until 10MB.