Empty spaces in tabbar

[woj-tek]

Hi,
first of all - thanks for the submission to MA so we can continue to use this great addon! :-)

After the update tho, I've encountered a small problem - picture says it best so:
https://www.dropbox.com/s/ddqveo6z9ds356k/Screenshot%202016-03-01%2014.09.33.png?dl=0

basically - there is weird behaviour which creates an empty space of the size of 3 tabs - it's really empty, I can click over it and it behaves like a space at the end. Any idea? Or how can I help with resolving it (logs, etc)?