Mouse click on cell selects cell and four cells below

[Andrew]

Hi all and thank you for being there.

Just migrated to Office 2007 and am working on a spreadsheet I made under
Office 2003. Unfortunately every time I select a cell with my mouse, the cell
is selected as well as the four cells below.

I have not been able to reproduce the error with other spread sheets.
Problem reoccurs each time the sheet is opened, but was not there earlier in
the week. Is this a glitch, data corruption or a setting that I need to
change?

Many thanks
Andrew