Rated 4 out of 5 stars

It's good idea to put the minimonth on the tabpanel but can you add the week number?
I have this error message below if ITNplus is activated.

Error: undefined entity
Source File: chrome://ltnplus/content/ltnUnifinderOverlay.xul
Line: 51, Column: 7
Source Code:

This review is for a previous version of the add-on (0.2).