UPDATE A subsequent update fixed the problem. Or at least didn’t re-create the problem.

HP software update 2.10 came out recently for Lion and Mountain Lion, and causes apps to crash when you try to print. If this is happening to you, here’s what to do about it.

Delete this:

/Library/Printers/hp/PDEs/hpPostScriptPDE.plugin

(You’ll need to provide authorization, either with sudo or by giving an administrator password to Finder.)

There is no step 2.