Difference in ANOVA results - R vs. JMP/Minitab

Thanks for your reply, Prof. Ripley.

And all of that is explained in the reference on the aov help page.
Please do stop speculating and start reading.

Well, the reason for speculation was cos I couldn't find any details on 
that help page... thanks for letting me know that the reference explains 
this...

AoV has nothing to do with coefficients.  There is dummy.coef to get
uncoded coefficients, and there is options(contrasts=) to set the coding.

Ok, I will try these...

Yes, you should read a lot more.  Chapter 6 of Venables & Ripley (2002) 
and chapter 5 of Chambers & Hastie (1991) would be a good start.

Oh, I most definitely should! :-) .. I guess I was hoping that such 
details would be included in the help page for the function or mentioned 
in some R introduction or tutorial or so on the Documentation page.. 
looks like that's not the case so I'll get a hold of the books above...

Thanks,
nirmal