This bug has really bugged me. If you check 'Page break at end' for a group in a SSRS report, pagination will start a new page after each group. However, there is no 'suppress page break after last group' setting. This means that SSRS (2005) will add a blank page at the end of you report, due to the page break after the last group.
I've read various discussions that imply that SSRS is SUPPOSED