If I use two jquery plugins on one page, and one uses a different jquery version than the other, would that prevent that one from functioning properly?

I know it's a pretty vague question. More specifically: I'm using a suckerfish menu plugin and a slideshow plugin (see it live here: http://www.pennsem.org)

For some reason, the menu collapses in a funny way when I use the jquery file the slideshow came with. When I use the jquery file suckerfish came with, then the slideshow stops working. Is there some way to make both function properly at the same time?