phranque - 9:48 am on Mar 28, 2008 (gmt 0)

i don't think the length of directory name matters.
i'm going to guess you are hitting a windows kernel limit - maybe 255 or so?
try doing a windows file name search for all files with more than 255 characters using filename wildcarding:

?...(for a total of 255 consecutive question marks)...?*