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I've run into an odd bug on a site using this module - if you search for a word of less than 3 characters, and then, from the custom search block on the page that returns, search for something different, the search results returned are for the original (less than 3 character) word, not the new search terms.
Example: if I search just for the word "of" (and yes, I realize it's highly unlikely anyone would ever actually do this on purpose - it was discovered by someone accidentally hitting return too soon), the URL of the page returned is search/node/of, and it shows the usual error message about needing to include at least one positive keyword with 3 characters or more, plus a custom search block that allows users to customize their search by node type, taxonomy terms, etc. But if I then enter "history of community gardens" (or whatever) there and search again, the page that produces is *not* search/node/history of community gardens as you might expect, it's still search/node/of, with the same error message as before. The page does refresh, but what it returns is the same as what was there before.
This happens regardless of whether I use the search box in the block or in the site header, and it keeps happening even if I search repeatedly. The only way to get it to search for the new phrase successfully is to go to a different page and search from there.
It does not happen if you search for a word or phrase of more than 3 characters initially - only if the initial search term was too short.
If I disable the Custom Search module, this no longer happens, so it's definitely something to do with this module.
I can get around it for now by lowering the minimum word length to 1 in the search settings, but obviously that's not an ideal solution, as it's going to bloat the database up considerably. And if it was my own site, I probably wouldn't even worry about it, since people aren't likely to search for a word of less than 3 characters very often. But this is a client's site, and it was the client who discovered the bug, and they'd like it fixed just in case. So if there's anything I can do about this (apart from lowering the minimum word length as I've already done), please do let me know.