Possible Bug: Contoured Group Warning

hope i don't duplicate any previous post, here's a problem a get:

make a group, apply contour tool, then - anytime you try to do anything with contoured group (including selection) - you get "warning from xara xtreme pro" (v5) - it's quite hard to ged rid of it (loads of esc key hits helped) and it makes any further work with contoured group quite impossible, so i believe it is a bug

anyway - v5 is excellent and i love it

PS.
warning says: "A group that is contoured cannot be ungrouped, please remove the contour before ungrouping"

Thanks.
Xara are aware of this.