Link to .capx file (required!):
This problem appears with any project if you are using medium or large fonts in the OS.
Steps to reproduce:
1. Set the size of text to 125%.
<img src="http://i.stack.imgur.com/EeApN.png" border="0">
2. Open "Parameter for Function: Call function" dialog for example (see images): image 1, image 2, image 3.
Operating system & service pack:
Construct 2 version: