I forget when exactly Wild Shape got errata'd to stop functioning like Polymorph, but it was some time late in 3.5's life (and this article leads me to believe it was early in 2006). My 2003 Player's Handbook certainly has the old "this ability functions like polymorph" line, and I am quite sure that the big Polymorph changes came after Libris Mortis (which was released in 2004).
So Corrupted Wild Shape was at least functional at one point.