Domain Mangling Regression

[sunnycemetery]

After upgrading from 1.10.1 to 2.0.2, mutt began forcefully lower-casing  
"From:" headers!  This can be seen at the compose menu, right after  
closing the text editor:

m...@dicalema.il
m...@dicalema.il
Does anyone know how to prevent this?  The first workaround that comes  
to mind is using sendmail to override from addresses, but that could get  
complicated fast.

Thanks!