There were plenty of glitches in electronic voting machines during Tuesday's election. But how many were serious ones? It's too early to tell. Most of the reports so far describe inconveniences, long lines and other hassles rather than anything more serious. (And of course vote fraud has a long and sordid history of occurring without computers.) But what we do know is that the security and reliability of e-voting machines matters more than ever before. About 39 percent of voters were expected to cast their ballots on Tuesday using electronic voting machines. Another 49 percent of voters are expected to use optical-scan voting equipment, which uses computers to tabulate paper ballots in a manner similar to standardized tests.