Without the change to the CRLF, the email wasn't being sent as HTML - the headers were being sent as part of the text message.
So far, everything is working on my 3.6 installation with no complaints from my users; however, as I said, I installed under 3.5 originally, so I haven't had the opportunity to try the installer under 3.6.
I did have a problem during the upgrade process from 3.5 to 3.6 and I had to clear out the xml files from the includes/xml directory (except for vB defaults). I never tracked down which XML file it was that was interfering with the upgrade; but once I was upgraded I moved the other XML files back and all was well.
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