<img src="http://puu.sh/1L0ti.png" border="0" />
Here's a picture. CTRL + S in the properties dialog opens up the save dialog, but if it's in an events dialog, then this happens.
Most other CTRL + KEY combinations do something: My guess is that CTRL + ENTER was enabled for line breaks, but that also allowed other CTRL combinations.
I have a Windows 7 laptop, Mobile Intel(R) 4 Series Express Chipset Family graphics card (chipset) which is up-to-date.