In Search > Find, when the file filter is set to "*.*", and jEdit's temp files are stored in one or more of the directories searched (which is the default), then if jEdit finds text in, let's say, x.txt, it will also find text in #x.txt#. In the case of many files, if the user is replacing several strings, then each time they do a Replace All, not only is the text changed in x.txt, but also #x.txt# gets changed, producing ##x.txt##. With more replacements, it gets worse. jEdit should ignore its own temporary files, or have that optional.