This is my mistake. Please ignore. I forgot that the whole word search was on.
Regex search does not work for some numbers
Yes, that does work.
I have narrowed this down. If in a JEdit sesssion you open a project viewer project and do a search in that project root, you can not afterward in that same JEdit session do a Search | Search in Directory without getting the error I cite above, even if you close your Project Viewer project. If in a JEdit session you never open a project viewer project and do a search in the projecty root, then you can do the Search | Search in Directory without a problem. Closing JEdit and re-opening JEdit is the...
Search/Replace suggestion
Searching in directory problem
I resubmitted this as a plugin bug, so it can be removed here as a JEdit bug.
Project Viewer inconsistency