The chairman of the House Veterans Affairs Committee said Thursday he would investigate software glitches at the VA that put patient safety at risk, calling the problems a sign of a “dangerous lack of accountability.” “VA continues to discover problems and attempts to fix them quietly and internally, and then downplays them as inconsequential and nonthreatening,” said Rep. Bob Filner, D-Calif. “No one expects new software to operate perfectly, but confidence must be inherent in any electronic medical records system.”