The solution is the on-line Support area on Apple's web site. It's in Article 2575, and it took me a while to find it. If, as I did, you're checking macosxhints first, hopefully this will save you some time.
[robg adds: As the article points out, the fix is to disable the "Times RO" font. Down near the bottom of the document, there's a one-liner that reads 'Some versions of stand-alone HP printer software install this font,' along with a link. The link, though, fails to load the proper page at HP. So I did a bit of digging, and found the page. It seems the font is installed by the driver software for the HP PSC 1300, 2400, 2500, and HP Officejet 5500 printers.]

