It’s not an extremely critical bug, but kinda annoying.
https://i.imgur.com/JBXAAFs.png
The icon on the gnome-main-menu is cut off. If I increase the panel height, the icon is fully visible, but then notification icons look blurry.
I have tried resetting my configuration and setting a different icon theme.
Here on this picture you can see that this is no intended behaviour:
https://dl.dropboxusercontent.com/u/20413076/opensuse/13.2/MATE/opensuse-mate-sonar.png
Source: forums.mate-desktop.org