Hello, flexbuilder 3 beta 2 had a bug in forms. This error arruined layout of forms when happen.
In my case i had a component based in form and in this form i dont specify the height because inside this form some formitem will be create in repeart dinamically. If i not specify height all form item labels no appear... but if i specify height everything appear but scrollbar will be showed whe repeater create more formitems than height. Problems, problems, problems.... The code of form component: <mx:Form xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:com="com.*" xmlns="css.geral" defaultButton="{btnCadastrar}" verticalGap="7" horizontalScrollPolicy="off" width="500" height="474">