Creator is hanging on the "Loading Editor" window when I try to create a report

Creator is hanging on the "Loading Editor" window when I try to create a report.

Here's the sequence of events.

1) Click "Reports tab"

2) Click "Create Report" link or button

3) Select "Pivot Table"

4) Provide/Select approporiate information

5) Window hangs with "Loading Editor"

I've tried this on Safari and Firefox (Mac OS X). Same problem. Any suggestions would be much appreciated.