The edit fields in the DWORD-Editor use Shift-Ins for Paste, Ctrl-Ins for Copy and Ctrl-Del for cut. This is way outdated. Windows Standard says that Ctrl-V, Ctrl-C and Ctrl-X are recommended though standard windows controls support both. Could it be that your controls are a little bit "beyond" standard ?
Second, pasting by selecting "paste" from the context menu does not update the other fields.
Just came across this one.