I do that intentionally when I make inlays.
Loosen the table tilt knob, use a credit card as a square to make sure the blade and table are 90 degrees and re-tighten the knob securely. Either forget about the degree gauge or adjust it buy re-setting the little pointer.
You also want to check the blade and table from the back and front side of the blade. You can adjust that with shims under the table hold down bolts or by filing an elongated hole in the back table support. This is seldom necessary however..... You never know, and that knowledge may help on down the way.
Now the make sure the blade is 90 degrees buy using a thicker piece of wood (1-1/2" or so thick) and cut a straight line into it about 1" or so. Now back the blade out of the cut, turn the wood around and put on the back side of the blade and see if the blade will slide back into the cut from the other side. If it works, Bob is your uncle and if not, START OVER again, you goofed. LOL