If the dialog under Print Frames is greyed out, the page you are looking to print isn't made up of frames more then likely.

Check it out here:
http://www.draac.com/framestest.html

Or you can right-click the page in question and see if This Frame and a sub-menu appear in the contextual menu. You'll be able to see that on the above test page, too.

Many thanks for the reply.

I tried the framestest page and, as you suggested, the options were no longer greyed out and it printed fine.

But I'm getting more and more pages that don't print properly, and I'm having to use a screen capture program to get anything sensible without wasting pages of nonsense (typically lists of links down the left-hand margin).

Is that because web designers are using different (non-frame) techniques increasingly and the browsers haven't caught up with them yet?