THE FRONT WINDSHIELD OF MY 2006 SCION XB DEVELOPED A CRACK WHILE I WAS DRIVING AND NO OTHER CARS WERE IN FRONT OF ME TO TOSS ROCKS. THERE WAS NO IMPACT FROM A ROCK OR ANYTHING BEFORE THE CRACK APPEARED. I HEARD A POP AND DISCOVERED THE CRACK. THE POP SOUND WAS NOT THE NORMAL ROCK ON THE WINDSHIELD SOUND. THERE IS NO SIGN OF ANY IMPACT ON THE OUTSIDE OF THE WINDSHIELD IN THIS AREA. THE CRACK DEVELOPED IN THE AREA BEHIND THE REARVIEW MIRROR AND IS AN "L" SHAPED CRACK. THE FIRST DAY THE CRACK WAS ABOUT 8-10" IN LENGTH AND HAS PROGRESSED ANOTHER 2-4" OVER THE LAST FOUR MONTHS. I FEEL THERE IS A PROBLEM WITH THE DESIGN OF THIS VEHICLE THAT IS CAUSING SO MANY XB OWNERS TO HAVE THE EXACT SAME ISSUE. *TR