When I do a tag-only search on the site (e.g. [rails]), the search results page doesn't remember that on the results page. It would be nice if it did - that would allow me to add to the search criteria without having the re-enter the tags from scratch.
We can't repro this.
I enter ...
... in the search box at the upper right, and then press Enter to search.
On the results page, the search box is now pre-filled with ...