a user mentioned that the rounded corners are not very pretty.
I use following attribute for the button: bgpaint='roundedrectangle(0,0,100%,100%,5,5,#FFFFFF)'
...yes this does not look to nice ;-)
We are using the Grpahics2 interface for drawing the rounded rectangles and this does not produce too nice results for small "rounded- values". For bigger values it looks much nicer => see screenshot attached.
Björn
PS: and, of course, you still can work with images inside bgpaint