I downloaded the evaluation version of Enercalc 6 today (2/6/08) it is version 6.0.10. In my first use I checked a beam design I did on Enercalc 5.8 using a rectangular tube in the weak axis. The values were completely different and after some searching I found that the HSS rectangular section properties are incorrectly inputted into the program. All the values are the same for the X and Y axis'. For example, Ixx = Iyy, Sxx = Syy...etc. Also, the wall thickness are incorrect for the tubes as well, HSS 8x4x5/8 has a wall thickness of 0.625" in the program, but as in AISC 13th it is 0.581". Hopefully these issues will be resolved soon.