Is this bug reproducible? Yes
Which devices did this bug appear on and is it reproducible on any devices?
Ipad3 iOS 6.01 : always impossible
iPhone 5 iOS 6.01 : ok
A quick summary of the bug: the plus button is inactive
Detailed Step-by-step instruction on how to reproduce it: click doesn't respond (the click effect appears).
I got the same bug ... BUT it is only in PORTRAIT mode ... if you go to landscape the search-field is shown and the "+" button is active
Landscape mode is ok
Portrait is ok for iPhone but not ipad
This is confirmed, we'll get this fixed as soon as we can.
Right now, we just released beta 24 that will fix the plus button in the portrait mode for Categories only. We plan to fix the rest in future beta updates.
Thanks for reporting this!