Hidden checkbox input with position:absolute breaks Chrome

(Apologies that I don't have a convenient reproduction of this problem, I'm working with private code that I cannot share.)

The ui-helper-hidden-accessible class specifies position:absolute. When this applies to a checkbox <input>, Chrome suffers from what appears to be a long-standing side-effect, as described in this ancient StackOverflow question: If the checkbox is contained in a bunch of nested <div>s where one of the ancestors is vertically scrolled, when the checkbox is clicked the scrolled ancestor's top/y value is adjusted by the scrolled amount, causing the <div> to become clipped at the top. If there's enough scrolling, the <div> can disappear entirely.

This does not happen in Firefox.

To work around this, I set position:fixed explicitly on the checkbox <input>, overriding ui-helper-hidden-accessible's value.

I think jQueryUI should address this problem. I'm not sure if it's OK to change ui-helper-hidden-accessible's value for position, or if it should only be done for checkbox <input>s (or if there's a better way to deal with this).

Start with the ui-helper-hidden-accessible class and reproduce the issue in Chrome using a checkbox inside nested divs with a vertically scrolled ancestor; compare the behavior with Firefox. Determine whether the fix should change the shared position rule or only checkbox inputs, while preserving the class's accessibility purpose and preventing the scrolled ancestor from being clipped.