When using the css from yui "reset-fonts-grids-min.css" it breaks yui-ext especially the grid when using borderlayout.
This happens also when the yui style is loaded before the yui-ext.css style.
The behaviour is slightly different in IE6 and Firefox 1.5.
For example, using complex.html from yui-ext, IE does not render all columms of the grid in east after load, but renders when one item is clicked. But then resizing does not work proper.
In Firefox, it looks ok.
Another effect: when adding a grid to the center region via the panel, it fails in bot FF and IE.
I am not sure wether to treat this as a bug, but since "reset-fonts-grids-min.css" is used in most yui projects i might be worth to mention.