1. UTF8 URL not support well when SEF is enabled by Joomla default.
3. UI too small and too close on mobile, which not easy too find and not easy to click by fingure.
4. Joomla 3.3.3 not fully support well. System message not bring to the guest. i.e. when login fail, mo message on front end until logged in successfully.
Thanks for your review.
The ajax update is potential overkill for many jomsocial sites. It is no wonder that you dont have this implementation either in core JomSocial or in third party extension. Imagine just one user with 1000 friends and site having to scan all of them to check if they generated some activity :)
Many servers would just blow up :)