Setting wmode to transparent, especially when playing video, has been known to cause some performance issues... setting wmode to transparent when you don't have a background graphic will also cause some unexpected display issues.... but we will need more information if we are to help you.
Setting wmode to transparent, especially when playing video, has been known to cause some performance issues... setting wmode to transparent when you don't have a background graphic will also cause some unexpected display issues.... but we will need more information if we are to help you.