I'm running Matlab (R2013b) on Ubuntu (results of ver command are pasted below).
I've just started working with this system, and I've realized that coding is seriously hard because the typical "tooltips" that show up in the editor are empty. I paste an screenshot (see below): the orange marks on the right margin of the editor should indicate a warning. Passing the cursor on them, one typically gets a tootip with a short message, detailing the reason of the warning.
In my case, I still the tooltip... but cannot read anything in there, it's just a grey rectangle. This is terribly annoying... Some idea on what may be the problem?
MATLAB Version: 220.127.116.111 (R2013b) MATLAB License Number: 133450 Operating System: Linux 3.5.0-41-generic #64~precise1-Ubuntu SMP Thu Sep 12 16:50:04 UTC 2013 x86_64 Java Version: Java 1.7.0_11-b21 with Oracle Corporation Java HotSpot™ 64-Bit Server VM mixed mode