Oh, cool, thanks. I had tried pretty much every button but that one. @_@
Also, the same receiver is connected to an SD TV, and I noticed this problem occurs on the SD TV, too, even when watching SD channels. Is there any way to fix that on the SD TV? I'm pretty sure I tried pressing the * button on the SD TV remote, and that didn't do anything (hence why I didn't think to try it on my HD TV).