Thank you Mike. It's the first time that someone reply me with details about this problem (your solution about buttons works, but I have not tried to rewrite classes).
Your response helps me about one important point: with Flex 2.0 it's possible to change padding, gap, height... but it's very difficult and constraining. Width and height are not defined by styles, padding and gaps must be "forced", some classes must be rewritten, ... So, I hope that the next version of Flex will propose more controls on the design... Paul
