He credited the Google researcher with "a good find" but said revealing it to the public before Microsoft had a chance to fix it puts the public at risk.

WSJ: Computer Experts Face Backlash

In a statement Microsoft said it was "investigating" the bug and working on a permanent fix.

BBC: Microsoft warns on IE browser bug

On its Security Response Center blog Microsoft said it had been notified about the flaw in December 2006 and had been working on a fix since then.

BBC: NEWS | Technology | Quick fix for Windows cursor flaw

Microsoft will build the fix into copies of the operating system loaded on new systems, but is not releasing it to the public.

CNN: Data loss threatens fast Windows systems

But I believe it is wishful thinking to assume any company that has standardized on Outlook will demand that Microsoft fix Outlook or threaten to switch to another client.

CNN: Linux users unscathed by ILOVEYOU