Dear Xara...

I use rectangles for buttons and have found the following anomaly.

Create a Box, colour it, clone and recolour that and place into the MouseOver layer and add a simple (#) Link to both.
In Preview, when hovering all works and the two boxes are SPANs with a colour and dimensions.

Bug - change their sizes, even by 1px, and Preview and the topmost MO box is now rendered as an image.

Xara - MouseOver Box Resize FAIL.xar

Acorn