[Webkit-unassigned] [Bug 73573] New: Typing in a text box doesn't work as expected after applying a non-matching css style rule

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=73573

           Summary: Typing in a text box doesn't work as expected after
                    applying a non-matching css style rule
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
               URL: http://www.gocomics.com/peanuts-holiday-countdown
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Major
          Priority: P2
         Component: CSS
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: fam.lam at live.nl
                CC: fam.lam at live.nl


(Doesn't happen in Chrome, fails in Safari 5.1.1 and 5.1.2 [didn't test other versions])

Reproduction steps
1. go to http://www.gocomics.com/peanuts-holiday-countdown. Log in with user: adblocktest password: abcdef
2. Type in the comment field: abc,,,cba (don't copy-paste: type)
3. paste the following in the address bar to insert the style element:
javascript:var c=document.createElement("style");c.innerText='div[style]{}';document.documentElement.insertBefore(c,null);
4. Repeat step 2

Before: 
The text shows up as expected
After:
The text shown in the textbox is "abc,cba"

Additional information:
- Adding the attribute 'type="text/css"' to the <style> element doesn't help
- The CSS selector doesn't match anything on the page. (and if it would, it doesn't add any rules, it's just {} )

OS: Windows 7 (but also confirmed on OS X 10.5.8)
Extensions: none

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