yes, there are about three glitches.....the most popular is the swords brother glitch (which i am sure you are familiar with), but if you have pixel perfect timing, you can double-jump then use the shield-rod+alcurad shield and get extra space (very difficult)...then of course falling you can do the same thing (ez) then there's other glitches.....got to this website, and some of its links for thorough directions
http://home.neb.rr.com/sf3/ and this website for a kick ass map
http://home.golden.net/~maggi/map.html