Cross cutting is quite a different task than ripping. Although we tend to use a combination blade on a table saw to allow us to both cross cut and rip, we could use a much finer tooth blade for cross cutting than ripping, giving us a cleaner splinter free cut.
When ripping along the grain of wood, we tend to push things smoothly along the fence. When cross cutting we have a much more difficult time moving the wood smoothly -- one of the reasons for the great popularity of the sliding miter saws, they don't rip but they do cross cut more easily than a table saw.
In the list of videos on your left you will find many details on controlling the problems of moving wood across a table saw for clean controlled cross cuts.