Clicking a select element in the page opens the first dropdown submenu (Issue in Chrome/Chromium)

Hi,
for some time I observed a weird behavior with admin menu, where clicking a select box somewhere in the page has the same effect as hovering the top-left corner of the viewport, causing the first admin menu dropdown to open.

I now noticed that this is probably a bug in Chrome.
See https://code.google.com/p/chromium/issues/detail?id=135109

I built a html page to reproduce the issue:
http://files.dqxtech.net/chromium-select/

The bug has a css aspect, and a js aspect.
The js aspect can be prevented by checking (event.relatedTarget.tagName === 'SELECT')
For the CSS aspect, I don't know how to prevent.

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I report this issue for everyone's information, and as search engine food, for people who thing this is admin menu's fault.

Nothing needs to be done on admin menu itself, unless we want to work around the problem before Chromium developers fix it.