I think what notthatsmart is talking about is that the evidence photos of the letters "B-I-G":
http://www.cfnews13.com/uploadedFiles/Stories/Local/allbigtroubleletters.pdf
seem to lack the sharp corner on the upper left hand side of the "B" shown in the photos of Caylee wearing the shirt:
http://www.websleuths.com/forums/attachment.php?attachmentid=5787&d=1256325295
http://www.cfnews13.com/uploadedFiles/Stories/Local/allbigtroubleletters.pdf
seem to lack the sharp corner on the upper left hand side of the "B" shown in the photos of Caylee wearing the shirt:
http://www.websleuths.com/forums/attachment.php?attachmentid=5787&d=1256325295