Repeated characters when typing in remote console

Details

When typing into a remote console, you see unintended repeated keystrokes.

Solution

If you are using a wide-area or low-bandwidth connection, the time delay over the network may be long enough to cause the virtual machine to start auto-repeat.

To reduce these effects, increase the time threshold necessary for auto-repeat in the remote console.

1. Power off the virtual machine.
2. Add a line, similar to this, at the end of your virtual machine's configuration (.vmx) file:
   
   keyboard.typematicMinDelay = "2000000"
   The delay is specified in micro-seconds, so the line in the example above increases the repeat time to 2 seconds. This should ensure that you never get auto-repeat unless you intend it. 
   
3. Power on the virtual machine.

To make the changes using the vSphere Client:

• Power off the virtual machine
• Right click virtual machine select Edit Settings
• Click Options > General  > Configuration Parameters
• Click Add Row
• Under Name enter keyboard.typematicMinDelay  In the Value field  2000000
• Click OK
• Power on the virtual machine

Source:-
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=196