Alongside the BBEdit 10.5.5 maintenance release, Bare Bones Software has updated TextWrangler to version 4.5.3 with many of the same fixes and refinements. Highlights among the nearly 30 improvements include TextWrangler offering to move itself to the Applications folder on launch if it’s not already installed there, the option to discard existing auto-save state by holding down Command-Control-Shift while launching the app, and improved custom cursors that look better on Retina displays. (Free from Bare Bones Software and the Mac App Store, 9.8 MB, release notes)
Is it a Unicode Font?
To determine if your font is Unicode-compliant, with all its characters coded and mapped correctly, choose the Font in any program (or in Font Book, set the preview area to Custom (Preview > Custom), and type Option-Shift-2.
If you get a euro character (a sort of uppercase C with two horizontal lines through its midsection), it's 99.9 percent certain the font is Unicode-compliant. If you get a graphic character that's gray rounded-rectangle frame with a euro character inside it, the font is definitely not Unicode-compliant. (The fact that the image has a euro sign in it is only coincidental: it's the image used for any missing currency sign.)
This assumes that you're using U.S. input keyboard, which is a little ironic when the euro symbol is the test. With the British keyboard, for instance, Option-2 produces the euro symbol if it's part of the font.