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Well received by fans. A brief verse from "Old Red Wine" was included in a medley of "My Generation" and "The Kids are Alright."

The new tracks made it hard for die-hard Who fans not to wish that this tour was in support of an album of all-new material.

That dream might become a reality. In an interview with www.gibson.com, Townshend said he is in the midst of writing and recording demos for a new Who studio album – their first in more than 20 years).

The past two years have been difficult for Townshend, who was accused of possessing child pornography. Townshend admitted accessing child porn sites while he was researching a future book on child abuse he is writing.

He was cleared of the charge, but his name was placed on a British sex offender registry for a five-year period.

Townshend – acknowledging either his personal woes or the opening night glitches – told the crowd, "It's been rough, but we love coming back to you guys."

The Who closed their two-hour concert with four numbers from their landmark rock opera "Tommy" – "Pinball Wizard," "Amazing Journey," "Sparks" and "See Me, Feel Me."

Opening for The Who was mrnorth.

Singer Colin Smith led the Dublin-based band through a 30-minute set, closing with "Bring It On" and the acknowledgment that everyone at the Tweeter Center – including mrnorth – had come to see The Who.