Bug reporter not working, so copy pasting here:
1) What happened
GUIStyles in custom editors leak into other areas of the editor.
In the example project, EasyTouch (available on the asset store), uses blue
section titles in its custom editor. This sometimes turns the Assets title
in the project browser blue.
I've also seen the top menu bar effected. Sometimes it gets the GUISkin
used in the game, making the menu bar almost illegible!
2) How can we reproduce it using the example you attached
Load the Test scene and select the EasyTouch gameobject. Also see attached
screenshot if it doesn't repro...
BTW, when I went to compress the project for this report, it failed because
files were open in Visual Studio. I wonder if that was the problem with the
bug reporter also...
Do not open attachments unless you trust the sender and were expecting them.