7.	Income Taxes

Ordinarily, interim tax provisions are calculated using the estimated effective tax rate (“ETR”) expected to be applicable for the full fiscal year. However, when a reliable estimate of the annual ETR cannot be made, the actual ETR for the year-to-date period may be the best estimate of the annual ETR. For the three months ended March 28, 2015 and March 29, 2014 we used the actual year-to-date ETR in computing our tax provision or benefit, as a reliable estimate of the annual ETR cannot be made, since relatively small changes in our projected income or loss produce a significant variation in our ETR. The actual year-to-date ETR on loss from continuing operations for the three months ended March 28, 2015 and March 29, 2014, was (61.3)% and 1.6%, respectively. The tax provision or benefit on loss from continuing operations in 2015 and 2014 differs from the U.S. federal statutory rate primarily due to the inability to benefit our domestic losses as a result of our valuation allowance on deferred tax assets, foreign income taxed at lower rates, changes in our deferred tax asset valuation allowance, state taxes and changes and interest related to unrecognized tax benefits.

There was no material change to our unrecognized tax benefits and interest accrued related to unrecognized tax benefits during the three months ended March 28, 2015.