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copied!<p>Using Unicode, there is more than one valid way to represent the same letter. The characters you're using in your Tricky Name are a "latin small letter i with circumflex" and a "latin small letter a with ring above".</p> <p>You say "Note the <code>%CC</code> versus <code>%C3</code> character representations", but looking closer what you see are the sequences</p> <pre><code>i 0xCC 0x82 vs. 0xC3 0xAE a 0xCC 0x8A vs. 0xC3 0xA5 </code></pre> <p>That is, the first is letter <code>i</code> followed by 0xCC82 which is the UTF-8 encoding of the <a href="http://www.fileformat.info/info/unicode/char/0302/index.htm" rel="nofollow noreferrer">Unicode<code>\u0302</code></a> "combining circumflex accent" character while the second is UTF-8 for <a href="http://www.fileformat.info/info/unicode/char/00ee/index.htm" rel="nofollow noreferrer"><code>\u00EE</code></a> "latin small letter i with circumflex". Similarly for the other pair, the first is the letter <code>a</code> followed by 0xCC8A the "combining ring above" character and the second is "latin small letter a with ring above". Both of these are valid UTF-8 encodings of valid Unicode character strings, but one is in "composed" and the other in "decomposed" format.</p> <p>OS X HFS Plus volumes store strings (e.g. filenames) as "fully decomposed". A Unix file-system is really stored according to how the filesystem driver chooses to store it. You can't make any blanket statements across different types of filesystems.</p> <p>See the Wikipedia article on <a href="http://en.wikipedia.org/wiki/Unicode_equivalence" rel="nofollow noreferrer">Unicode Equivalence</a> for general discussion of composed vs decomposed forms, which mentions OS X specifically.</p> <p>See Apple's Tech Q&A <a href="http://developer.apple.com/mac/library/qa/qa2001/qa1235.html" rel="nofollow noreferrer">QA1235</a> (in Objective-C unfortunately) for information on converting forms.</p> <p>A <a href="http://lists.apple.com/archives/java-dev/2010/Feb/msg00177.html" rel="nofollow noreferrer">recent email thread</a> on Apple's java-dev mailing list could be of some help to you.</p> <p>Basically, you need to normalize the decomposed form into a composed form before you can compare the strings.</p>

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