I have tried the configurable keyboard, namely WMediaPlr one.
It appears that the control-button isn't being pressed. For example pressing Play does nothing. However, in notepad a 'p' is typed. (If it were Ctrl-P, then notepad would try to print).
The Vol-Up and Down keys work ok (there's no Mods on them).
Hope this can be looked into/fixed
Nice work otherwise.
NB. using default keyboard and pressing Ctrl-P will play/pause media player just fine.
