Firefox 4 Print Frame options not working properly

I am using Firefox 4 and trying to print a specific frame on a web page which definitely has frames. The frame print options are grayed out, even when I tried selecting the frame. This problem appears specific to Firefox 4. I have been accessing this web page and printing individual frames for years. When I was using Firefox 3.16 up until yesterday, these options were not grayed out. In Internet Explorer 8 and previous versions, the print preview screen included frame print options; when I hopped over to Internet Explorer 9, I found that the print preview screen had been changed to no longer offer these options (!) but a little Internet research showed that pressing Ctrl-P on the frame in question did in fact print the individual frame. So what is going on with Firefox 4? And why are frame print options being phased out in both Firefox and IE?