I just tried the top five HN links. All exhibited the problem.
http://blogs.msdn.com/b/powershell/archive/2011/04/16/powers...
http://www.logolounge.com/article.asp?aid=lnPf
http://code.google.com/p/leveldb/
http://www.technologyreview.com/computing/37525/?p1=A2&a...
http://openfarmtech.org/weblog/2011/05/solar-fire/
For each, I clicked on the link, and then clicked my newly made Readable bookmark, which I had set up using the default settings. Then I went to Firefox's File:Print Preview. I have it set on the default settings (Shrink to Fit, Portrait). For each of the five articles listed above, the result was that only one of the displayed pages had article text on it, and this was not the entire article, since it would not fit on a single page. Sometimes other pages were displayed, sometimes not, but if there were any, then they were blank pages.
I am running Firefox 3.6.16 under Ubuntu 10.4 (Lucid). I'm perhaps a bit behind in my patching, but, in any case, this is not a new problem.