Another Bug that has everything it needs to come onto my personal favorites list. Read on and decide by your own:
In Lotus Notes 6 you can "Drag and Drop" a document from any view or folder onto your Windows Desktop or any folder on your harddisk. Notes automatically creates a Document Shortcut which is in fact a file with the extionsion .shb which are marked by registry entries as special objects like files with extionsion .lnk.
Try to create such a Document Shortcut and cut it from your Desktop to paste it into any folder - this will crash your Windows Explorer.
If you experience the same problem please report it to IBM Lotus Support, they are looking for reproduceable scenarios to get this fixed in a later release.