I want to report this bug, the Advanced Search Option won't open when I clicked...this is the screenshot from wpforo.com/community website:
Hope this can be fixed in the next release.
The bug is in the appearance of the [Advanced search options] button. This button should be removed in Tag Search form. Because there is no advanced search options for tags. So in text version we'll remove that link/button. The advanced search options are only available for regular search, not for tags.