Reuters:  Romneys Reported Sharp Gain in Foreign Income in 2011 Tax Return, by Lynnley Browning:

Mitt Romney and his wife, Ann, more than doubled their investment income from foreign sources in 2011 versus 2010, including some sources in tax havens around the world, according to tax returns released by the Republican presidential nominee's campaign.

The Romneys reported $3.5 million in foreign income out of $13.7 million in 2011 adjusted gross income, the benchmark figure used to figure out taxes owed. That compares with $1.5 million in foreign income on 2010 AGI exceeding $21.6 million, according to the Romneys' tax returns for 2010 and 2011.

That means the Romneys last year derived just over a quarter of their income from non-U.S. investments, such as funds and entities in Bermuda, Luxembourg, the Netherlands, Ireland, and the Cayman and British Virgin Islands, the returns showed. In 2010, the Romneys' foreign income was just 7% of their AGI, which was much higher that year.

While the Romneys' tax strategies are legal, their large share of foreign-sourced income highlights the difference between their tax returns and those of average Americans. … Overall, the Romneys received income from 50 foreign investment corporations last year, nearly three times the number in 2010, the returns show.