Hi,
I had a layout problem with the simpleTogglePanel and the panel. As soon as I had a table with 100%-width in it, the IE7 made the content a bit wider than it should be. Making the content range out of the panelborders.
After some reading on the web (http://www.satzansatz.de/cssd/onhavinglayout.html), I found out that there is is a IE problem. I extxended the CSS-classes used by the two panel-tags and everything went fine.
Maybe it is a good idea to add some layout-information to the CSS-classes by default.
Best regards.