Standard logout link problem

After enabling SEF Advance link to logout from joomla stops working. This link is in form of:Generation of that link is descibed here: http://rselvakumar.blogspot.com/2013/02/logout-link-for-joomla-15-and-25.html and there are even extensions to generate such:  http://extensions.joomla.org/extension/quick-logout

The problem is, that after clicking such link, user is redirected towhich generates error 404.

What is causing such situation and how to fix it? I am using joomla 3.4 and SEF Advance 1.6.6

Yes, seems like an issue. I will fix it for the next version, this week.

I can't wait to see new version then.

I've noticed also that despite seeing new version in About section of component configuration, Joomla can't find it in Extension Manager: Update site. (Doing find updates finds other components ready to update, but SEF Advance is missing on that list)

Fixed in 1.6.8.

After installation of 1.6.8 logout link is not working correctly, it gets 404 on redirection to the following url:
starting point was as in the first post url in form of:

solution: com_users.php
if block for matching '&return=' should be in a top of function build or even better should be merged with '&([0-9a-fA-F]+)=1' matcher