The mouseover color block didnt use to show if you set the all programs background to a trans setting of 'disabled(so as now)'.
I never understood what that meant but it worked for the allprogs arrow trick...it got rid of the color block out on the totally translucent parts.(both arrow and background have to be zero color information where you want the block to disappear)
It was broken sometome during WB6 and continues into 7.
It would be great if this setting could be made to work again...I used it on almost all my blinds.

This is on XP but it happens on all OS's(to me)...nvidia 8600gt...latest drivers.

thanks for your help Neil. 