I often use the feature of Hyper-V that allows you to “type clipboard text” into a virtual machine.  Unfortunately, in the Windows 8 / Windows Server 2012 beta release there is a known issue where doing this can result in missing or garbled characters being typed into the virtual machine.

Luckily – Ned Pyle has posted the details of how to work around this here.

My preferred option is to increase the keyboard buffer (the second option that he outlines).

Cheers,
Ben