Re. error messages when trying to use search: I am experimenting with advanced search right now.
1/ I first did a search just using my user name and it returned a list of threads (that did work when I clicked on them.)
2/ I then entered my user name plus a specific keyword. That returned a list of threads as well (that also worked when I clicked on them.)
3/ I then entered my user name, specific keyword and one forum. This narrowed my results and the threads opened appropriately when I clicked on them.
4/ I then entered my user name, specific keyword, one forum and filtered date to a very narrow range (the last 10 days.) This gave me back only 3 threads, and they opened right up. So at least for me, advanced search is working as it should.
I tried to find the juicer/green smoothie threads and found a post referencing a thread to click on- I believe it was probably the long thread that had all the recipes for all the green smoothies, etc (I had tried to find it via advanced search too) and the link for it was broken in the thread. I am wondering if it's a problem with that particular thread rather than search itself.
Re. search bringing back keyword results limited to thread or title content, not signature content: there is a drop-down option to search only thread titles, not post content for keywords. In this instance, the only thread that comes back with the word "gladioli" in it is froggymama's. Another way to narrow search results is by entering keywords in the "these exact words" field, which ensures that all terms you are looking for are included in each result, not just some of them. In this case, it's particularly valuable, since Burkholderia gladioli is rare- but if results gave back everything referencing just Burkholderia you'd get tons of hits about cepacia, which is not at all relevant here.
Several of the threads that came back in the 'burkholderia gladioli' results only have posts referencing it because of how someone signs all of her posts- but this person doesn't utilize the signature feature on the site, she signs her name and what she cultures within the body of her post, so search is going to pick it up.