We upgraded to 1.70.4814.21440 via an upgrade notification.
We use mRemoteNG on WinXPSP3 to remote into another computer and then run mRemote on their box (their's is not upgraded) and then use the mRemote to remote them into a windows Server 2003 box. We enter the password for them. We can no longer type a Capital letter (tested by typing in the username field).
Two of use did the upgrade and can't type the capital letter. The one person that didn't upgrade can type a capital letter in the password field.
Windows XPSP3 to XPSP3 to Server 2003