I just submitted a bug on this (#39018), but I'm generally just wondering how many people are getting this, or if anyone has a solution. There's a similar bug for Sugar 5.0, but the bug is closed.

Whenever I try to convert a lead to a contact on my SugarOnDemand system (but not on my local version of SugarPro) the email fields in both the old lead and the new contact end up blank. I disabled any custom logic, rebuild/repaired the entire system, and the problem still occurs. Therefore, I'm certain its a fault in the codebase and not anything I've added. Both systems are running Sugar 6.0

As email addresses are highly valuable information, you can see how debilitating this can be.