The width and height of the UI_LISTFIELD don't seem to work. Width with work up to 99 pixels, but then just jumps to full width. Height doesn't make any difference at all.
This results in an 'out of tab page bounds' error, and also means you can't place other controls.
AC24. Haven't tested in AC25.
This is only in the preview window while scripting. Seems to work once you place the object. Makes it a bit hard to test.