This article claims that you can grep for the version number using otool and if ...

This article claims that you can grep for the version number using otool and if it's not present the binary uses a different version of the library.

Latest Dropbox (v2.6.5), Adium, and Skype are fine according to this test. Most of Apple's software appears vulnerable however.

I'm not at all sure if this test is definitie however.