Dimension Fits Missing

When we recently upgraded to AutoCAD Mechanical 2009 and a few users could not choose their fits when dimension (ie H7, f6, etc...). It took a while to figure out, but another user found the answer. There was file corruption with the fit data (VAL tables). We copied the files from a known working set (ex. ACADM 2009\Acadm\gen\Val) to the non-working AutoCAD computer (AutoCAD should be shut down while copying the files). The fits are back!