Like tricks that others may not know about yet. Most of them are silly, but still sometimes semihelpful. invisible characters ==================== characters that appear as spaces, but that Reddit doesn't yet officially recognize as spaces yet (e.g. for anti-stretching code) U+02DE . (Firefox only -- renders in MSIE) ** reddit uses Py_UNICODE_ISSPACE() to determine if a character is a space or not. http://docs.python.org/c-api/unicode.html#Py_UNICODE_ISSPACE http://code.reddit.com/browser/r2/r2/lib/c/filters.c?rev=2de837f52a1b813ab460619a7d1010927a69d362#L237 which is really just the standard iswspace() http://svn.python.org/view/python/trunk/Include/unicodeobject.h?revision=72283&view=markup http://linux.die.net/man/3/iswspace