IE can drop a floated column with a percentual width when the browser window is narrowed.
ppknote: Explorer Mac crashes when you resize the test page.
Test page Workaround is included
Reported by: Chris Hester.
Explorer 5-6 Windows, Explorer 7, Explorer Mac | Reported on 4 October 2006.
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1 Posted by Uwe Claus on 4 October 2006 | Permalink
Either margin-left: -1px to the right div or margin-right: -1px to the left div should correct this rounding error.
tested on IE7_RC1