This is a funny behavior that I have noticed. It's probably more related to Java than to Aware IM.
I have a form section with a separator placed on it. Inside the separator I place a list attribute. I leave the width of the separator blank to simply use available space. I set the width of the list attribute blank for the same reason.
I discover that the list object can't seem to size itself correctly unless I include something else in the separator like an HTML section. If I include an HTML section (with text) then the list attribute sizes correctly to the separator. If I don't include the HTML section, or do not provide text in the HTML section, then the list attribute does not size correctly.
Here is an image of the display. All of the sections and list attributes are configured essentially the same but the top list attribute has an HTML section with NO TEXT and is not displaying correctly. All list attributes below it display correctly because I have placed an HTML section above the attribute with some text.
http://www.essentialsoftwaredev.com/images/FormClip.png
The only other thing that works is explicitly sizing with width of the list attribute.