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					Originally Posted by kovidgoyal  Normal searches are converted into regexes internally, so you have to use a double backslash in the replace expression, i.e. use
 \\1 -
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 I didn't know that either. Is it in the manual?
Possibly when a user is in [Normal] search mode and enters a backslash or other escape-able character, Calibre could change the search and replace  terms internally to be compatible with he internal RE engine?
Not knowing the 'trick' could lead to a lot of head scratching