Buttons disappear from dialogues

Link to .capx file (required!):

Not relevant, only affects editor

Steps to reproduce:

1. Use C2 a lot (I presume)

2. Add any event + action

3. Open an action

Observed result:

<img src="http://www.adamprack.com/materials/c2nobuttons.jpg" border="0" />

There are no buttons. ENTER and ESC still work, but nothing clickable.

Expected result:

Buttons present!

Note: Resetting dialogues in the menu will correct it, but it's strange this could happen at all.

Browsers affected:

Chrome: n/a

Firefox: n/a

Internet Explorer: n/a

Operating system & service pack:

Windows 7 64 Professional SP1

Construct 2 version:

130

It repeats for me even after resetting dialogues after a little while of use. It doesn't matter what I'm doing--just playing with/adding events. Even on a blank project. I recall the buttons disappearing for the first time in ver 129 (possibly 128).

We need the exact steps to reproduce the problem otherwise there's virtually nothing we can do.

Did you mess with Windows UI system? or maybe check video card update