i've sold appliances for a year and a half, and it's VERY common for people to break their washer this way - i'd call a service tech out before you try to use it for anything else because if you try to fill it again and it's broken, you'll flood about 50 gallons of water into your house.
and to all those out there, PLEASE do not wash a king-size comforter unless you have a 3.7 cu. ft. washer or larger, or a queen-size unless you have a 3.5 cu. ft. or larger. you should be able to find cubic footage info on a sticker on the washer itself were the model number is. if in doubt or if the sticker doesn't say, get the model number and put it into the manufacturer's website.
an easy way to tell, though, is this: if your washer loads from the top, unless it is a Whirlpool Cabrio bought in the past 6 months, you don't want to put a comforter in it unless you are sure of the cubic footage. if it loads from the front and is an LG, Samsung, Kenmore, or Whirlpool Duet (not Duet Sport), it can accomodate a king-size. any other front-loader can accomodate a queen size or smaller.