AutoCAD Performs Incorrect Calculation

My friend notify me about this bug a couple days ago. He mention that when we use the QUICKCALC (or CAL) command, AutoCAD returns incorrect value. This is a bug.

Try to calculate 750-693. You may see it returns incorrect value. I got 56. There are some more incorrect results.
Yesterday, VMichl notify me that this issue has been fixed in AutoCAD 2010 update 1.
Snipped from readme:

The following defects have been fixed:
(One of them is:)
QUICKCALC
Calculations performed by the QUICKCALC command may be incorrect.

If you have the same problem, download the update 1 here. Install it, and see if it’s fixed.

About Edwin Prakoso

I work as a Sr. Technical Consultant in Tech Data Advanced Solutions Indonesia. I've been using AutoCAD since R14 and Revit since Revit Building 9. I occasionally write for AUGIWorld magazine and also active in Autodesk discussion forum.
I'm an Autodesk Certified Professional (ACP) for Revit Architecture and AutoCAD. I'm also a member of Autodesk Expert Elite, appreciation for individuals who give contribution to Autodesk community.
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