Honestly - this is the best mobile theme I've ever used on a forum. I love it.
Glad its working well!
2.0 did a fair amount of changing the existing CSS to Flex and Grid layouts to the frequently used areas. That allowed a lot of crud/tricks/float/table/etc removal since (flex./grid) were designed to do what we need. The goal (at least for me) on the beta was to have things look mostly the same, but with a new temp[ate/css structure behind it. Its far from a template engine or anything like that, but a refactor of the old layout to current capabilities/standards.
The cause is do the 2.0 "conversion" and one table column not being updated to the new values. It should be adding your like, its the member notification of that like that is causing the error. I'll get this fixed tomorrow, need to test an update query first.
It's great to see Elkarte back up, Is there a list of changes for 2.0?
Not really, I can try to come up with something that users may care about. There was a tremendous amount of restructure to the code, (as we did in 1.0 and somewhat in 1.1) which a typical user would not care about.
That's fine no need then, sometimes major changes and this is just easier. (smiley worked with adding : )