The dollar gained for a second day on the euro Thursday, helped by modestly positive data on US jobs and trade and the lack of fresh progress on eurozone troubles.
At 2100 GMT the euro was trading at $US1.2301, compared to $US1.2363 late Wednesday.
The Japanese yen was mixed. It gained against the euro -- one euro bought 96.64 yen compared to 96.99 yen -- but slipped against the US dollar: the dollar rose to 78.55 yen from 78.45.
"While there are few clear catalysts for today's euro weakness, Greek tensions have resurfaced over the past couple of sessions amid reports that the review of Greek finances by the European officials will not be completed until early October," said Vassili Serebriakov of Wells Fargo Bank.
"US economic data was relatively firm in tone, while another factor helping the greenback today are higher US Treasury yields."
"Summer relief won't stop the euro's fall," said Sebastien Galy of Societe Generale.
"The reluctance of the Spanish and Italian governments to ask for help through the EFSF has stopped the euro's short-covering rally, but hasn't derailed the 'risk-on' mood that has seeped through markets since last week's European Central Bank meeting and US payroll data."
The British pound slipped to $US1.5635 from $US1.5657, while the Swiss franc moved to 0.9764 francs per US dollar from 0.9715 francs.