Microsoft JScript runtime error: 'c.validator.methods[...]' is null or not an object

Every time when I lookup any combo and click any place of page after that - I have error message from validator.
nC ver. 2.20, IE 8.0

Only for combo without style (see picture)
http://s42.radikal.ru/i095/1112/b3/202ed67cc2a6.jpg

You're absolutely right. It works fine even this validation error is displayed. But I don't know how to this fix and what causes it. Maybe, updating all jQuery scripts to the latest version will fix it (I'll test it a bit later)

Just pointing out that the same holds for v 2.30 as well. I'm in the process of changing the jquery scripts to their latest versions, and I'll post the results as soon as I test them.

jquery 1.7.1 (latest) seems to break superfish, but v. 1.6.2 seems to work ok, and I'm not getting the validation error anymore.

I haven't changed the validator script - only the jquery main script.

HTH

Upload please necessary file(s) and say more detailed solution. Only change one js with other or need additional steps?