5 stories to follow: March 21

The window-shopping calculator at Healthcare.gov uses incorrect poverty-level data to assess eligibility for subsidies. This fictional Philadelphia couple, with income just above the poverty line, should meet the requirement.

Here's your look at five stories to know about before the weekend starts:

1. Obamacare website glitch: There's a new glitch involving Healthcare.gov -- erroneous poverty-level guidelines are telling potentially qualified users that they don't meet the requirements for subsidized insurance. The problem chiefly affects households in states (like Pennsylvania) that haven't expanded Medicaid and have incomes just above the poverty line.

2. March Madness: Villanova defeated Milwaukee, 75-53, Thursday night, setting up a third-round match-up against Connecticut, which beat St. Joseph's on Thursday. The Wildcats face the Huskies at 9:40 p.m. Saturday. Follow today's games with Philly.com's live chat.

3. Vatican trip: Mayor Michael Nutter, Gov. Tom Corbett and Archbishop Charles Chaput are departing Sunday for a five-day trip to the Vatican. They' have an audience with Pope Francis and will be working to plan the September 2015 World Meeting of Families, a massive gathering that could bring up to 2 million visitors to Philadelphia.

4. Kane hires attorney: Pennsylvania Attorney General Kathleen Kane has hired Philadelphia lawyer Richard Sprague to represent her in potential defamation suits surrounding her decision to drop a sting operation that reportedly captured Philadelphia Democratic public officials accepting cash and gifts.

5. Flash mob mass: Philadelphia's first-ever "flash mass" will take place this weekend at St. Francis Xavier in the city's Spring Garden neighborhood.