Timeline: Time range slider not working in profile

Timeline in profile (/_USER_NAME_): Time range slider is not working when not logged in.  Timeline in Timeline (/m/wall/index/_USER_NAME_) is working fine.

JS error:

TypeError: 'undefined' is not a function (evaluating '$slider.slider(oOptions)')

Can't reproduce on demo.boonex.com, please could you try to reproduce on demo.boonex.com and if it is possible then please specify your browser type and version?

Can't reproduce on demo.boonex.com either. Is that a fresh install for every new version?

My installation was updated (with rsync) from version 7.0.9

Timeline works with a clean install and an import of the existing database.

I suppose the problem is the updating. Is this fixable or do I have to do a clean install?

demo.boonex.com is manually upgraded using official Dolphin patch every time new version is out (it is continuously upgrading from some 7.0.x version).

I would suggest to use official upgrade patches to make upgrades.

Your problem should be fixable, I can't tell the particular solution, but someone who has experience in Dolphin and access to your site should be able to fix this, however if you made incorrect version upgrades in the past - it maybe some other problems will have arise someday, so clean install should be better solution.