My Excel 2003 installation has started doing something weird, and doing a repair didn't resolve it. One workbook that I use a lot has about 10 tabs, and when I'm in anything but the first tab and left-click on the first tab to activate it, instead it opens a menu starting with Restore, and several other options. If I RIGHT-click it, it moves to the first tab and also opens the Restore menu, which is a minimally satisfactory workaround, but annoying. Has anybody encountered this, and if so, can you suggest a fix?