Operating system: Windows 7 (64 bit)
Graphics card: Radeon HD 8670D
Broken: 2.80, 69b2f5268114, blender2.7, 2019-02-10, as found on the splash screen
Short description of error
If any non-single-column layout (box(), row() with 2 or more items, etc.) is used in a menu's draw() function, all subsequent widgets will be shifted to the right.
Exact steps for others to reproduce the error
Open the attached file and run the script. In the text editor's left-side shelf a "Test Panel" will appear, which would contain a test menu and a bunch of labels in a test layout. If you open the menu, the labels in it will be shifted.