I'm using MSIE with Clean AJAX version 4.3 and ran into a bug on line 47 of
the HistoryTool.js.
The code attempts to access window.cleanHistoryFrame.contentWindow.document
before checking whether window.cleanHistoryFrame is not null. I moved line
57 into the immediately following if(...) block and eliminated an error in
MSIE. It's not clear why the cleanHistoryFrame is null in IE but not...
