Hi Martin,

I guess that means that you have absolutely no customisations to your toolbars and menus - that would be the case if you've just done a fresh install.

At this stage it really does sound like a genuine bug as opposed to some sort of workbook corruption or problem with one of your add-ins. If that's the case, it's not something we're going to be able to fix here. It's worth reporting it to Microsoft and coming up with an interim solution to workaround the issue. One workaround might be to try to programmatically add the hyperlink to the spreadsheet.