Quote Originally Posted by lemuria View Post
It's 5.0.18, on Dreamhost.

It would be great to hear any ideas, I'm stuck on this one! If this problem is unrelated to the add-on and there's a better forum for it, please let me know.
I suspected that you would say something like this. I believe that the specific insert that is failing starts in line 242 of the admin/attributes_controller.php script. The comment immediately above this line says "TODO: MySQL5", suggesting that this insert may need tweaking for MySQL5 compatibility. That said, I've not seen this problem in my MySQL5 environments (and I have dozens).

Are you seeing this on a clean database? Or on a copy of your client's database? If the latter, has your client's database been upgraded from 1.2? If so, could you post a copy of the product_attributes table schema?