No, I specifically mean "cached phrases": http://lesswrong.com/lw/749/cached_phrases/

The fact that someone has a web page devoted to this particular eggcorn doesn't change the fact that it is an eggcorn: http://eggcorns.lascribe.net/forum/viewtopic.php?id=4566

The fact that "cached phrase" has a similar pronunciation to "catchphrase" does not mean that they are related. In particular, this is not an instance of an eggcorn because substituting one for the other will result in a sentence that does not make sense. The quotes in the page you link to are instances of malapropism ( http://en.wikipedia.org/wiki/Malapropism ).