In Excel, there are some error-checking buttons that allow you to scan a workbook for many types of errors, including circular references.  It would be awesome if MV had those same options within Workbook Explorer, especially if it could check for circular references across the multiple workbooks (W!, D!, H!, E!, M!, etc). 

This came about because we believe we may have created a loop somewhere in our current library, but we are struggling to locate it because we think it is bridging two (or more) workbooks.