Yesterday (hat tip a Fistful of Euros), from Bloomberg:

The [euro] also weakened after Germany's Stern magazine reported German Finance Minister Hans Eichel and Bundesbank President Axel Weber discussed a possible failure of European monetary union...

The euro retreated from as high as $1.2341 after the magazine said Eichel and Weber, who represents Germany on the ECB's policy committee, discussed the euro's potential failure with economists. The magazine quoted Joachim Fels, chief fixed- income economist at Morgan Stanley, who Stern said took part in the meeting. 

Today, from Forbes.com:

German Finance Minister Hans Eichel does not believe the EU monetary union will collapse and he is not interfering in the monetary policies of the European Central Bank, a spokesman for Eichel told AFX News.

The spokesman was reacting to a Stern magazine report which cited sources as saying Eichel's ministry has blamed the euro for the continuing weakness in Germany.

Eichel does not see the danger of a collapse of the monetary union. That is an absurd assumption reported by Stern, the spokesman said.

Eichel believes the monetary union is a success. As in the past, we do not interfere in monetary policies' in the euro area, he added.

UPDATE: Edward provides yet more insight at afoe, here and here, and says "I think this story may run and run over the months to come."