Can anyone verify if this bug is happening on your side:
When an image well is designed into an image resource, and it is placed into a PAGE, the mouseover works well as long as the page is opened in its own window, but fails to perform if placed inside a frame.
Subject: Solution found: isn’t working as a page background
Found the solution.Image resources aren’t working as mouseover when they are set as Page Background.
Pretty obvious after all… except it raises another question: how can we get rid of the annoying margin when we need to position an image ressource on a page?