Description

Originally reported by ClarkeyBoy1987 at https://bugs.jquery.com/ticket/12024, later migrated to Sizzle in jquery/sizzle#122 by @timmywil.

From @timmywil:

http://jsfiddle.net/timmywil/n8zDu/14/

The inputs in the example all have uppercase values for their attributes while the value in the selector is lowercase. When :not contains a complex selector, querySelectorAll fails and Sizzle handles the attribute comparisons but does not account for these attributes being case-insensitive. We can fix that, but it will probably require a list within Sizzle specifying which attributes are case-insensitive in both HTML and XML.

This is both low priority and valid. It all depends on how much size it takes to keep a table of all attributes affected (in both HTML and XML).

Link to test case

http://jsfiddle.net/timmywil/n8zDu/14/