I believe that I read that it could be any antivirus application.
Did turning off email filtering resolve the issue?
I downloaded the Outlook Hotmail Connector version 14.0.4760.1000.
There is a 32-bit and a 64-bit version.
My operating system is Windows 7 Home Premium 64-Bit.
But I chose the 32-bit connector to match the MS Office / Outlook that I own.
So far, I no longer have blank emails.