The web search plugin module should parse out newline characters and replace them with space characters instead. Some web search engines will chomp at the newline character and only search the first line of a string. I can't think of a usage case where a user will have included multiple lines in a search string but only want the first line to be searched. I also can't think of a search that behaves differently when it receives a multi line search than when it receives an all-spaces search (except when it is chomping at the newline).
I'll give an example of where this could be a problem. I set up a google maps web search bookmark. I think it would be really nifty if I could drill into contacts from my Address Book and get their address -> Find With... -> Google Maps Quicksearch Bookmark and see their address. However when I do this, it only maps the first line of the address which is not enough to get a pin on the map. Similarly I might want to cmd-esc a two line address from a website into a google maps web search, but I can't, because google maps chomps at the newline. Amazon.com's search also chomps at the newline, as do most other searches that I tried. The only two I found that can handle newlines in their searches are Google and Wikipedia. Eh, where do I send this bug? I couldn't find a bug tracker on blacktree.
