I’ve discovered that Sublime text fails to find anything in files which contain control characters, but only when using “Find in Files”. Using regular find in an open file works fine.
I see this happening with files which are predominantly text but also contain ESC, NAK, DLE, DC2 etc. characters. Just the presence of any one of these characters causes the search to return nothing for that file. Sublime Text always reports that it has searched the correct number of files (e.g. when searching a folder or project), but never finds a match in any of the files which have the control characters.
I can replicate this with OS X and Windows 64-bit versions.
Example of file with control characters - find in files won’t find anything in this file: https://www.dropbox.com/s/whkbmju0kza3l6l/Ctrl%20chars.txt
Example of same file without control characters - find in files works perfectly: https://www.dropbox.com/s/dhn6fdzzoklzjo8/No%20ctrl%20chars.txt