Steps to reproduce bug
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1. Open QtWebkit-based browser (specifically QupZilla or Arora)
2. Open a Google Document or Google Presentation (Spreadsheet app seems not quite affected).
3. Edit the content, activate an input method in below-the-spot(non-inline) mode(which a preedit area will appear until user finishes edit), try to input any non-English characters.
#QTBUG-30671 issue reproduce video - YouTube
http://www.youtube.com/watch?v=VAFoqkTBetE

What expected
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non-English content committed by input method from the preedit area correctly inserts into the document.

What instead
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All content committed by input method are dropped

Other info
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• Other places outside Google Docs(like a simple text-box) isn't affected
  Previous bug report
• Input method's on-the-spot(inline) mode isn't affected

Workarounds
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• You can still use Google-Docs-integrated zhu-jin and pinyin input method to input Chinese chrarcters.
• Set input method into on-the-spot(inline) mode.