Pretty much everybody hates infinites. for the newcomers to the fighting games scene, an infinite is a combo that takes all of the opponents life energy.
What is annoying about an infinite is the non ability for the adversary to break away from the combo.
According to internet gossips and this newly found video (through SRK), El fuerte appears to be the only character (so far) to have an infinite combo.
Rest assure though capcom will probably patch the issue since inifinite combos really mess up the competitive aspect of online gaming.