Electronic unemployment filing systems have crashed in at least three states in recent days amid an unprecedented crush of thousands of newly jobless Americans seeking benefits, and other states are adjusting their systems to avoid being next. About 4.5 million Americans are collecting jobless benefits, a 26-year high, so the Web sites and phone systems now commonly used to file for benefits are being tested like never before. Even those that are holding up under the strain are, in many cases, leaving filers on the line for hours.
