Dawinderpal Sahota reports to telecom.com that "..Vodafone has been ordered to pay €400,000 ($528,000) to the Commission for Communications Regulation (ComReg) in Ireland for failing to automatically apply a spending cap of €50.00 [see "EU Helps Preventing Mobile Bill Shock" - here] to all data roaming customers who had not chosen to opt out of the data cap .. In addition to paying the regulator the fine, Vodafone must resolve any issues that have been raised by customers in respect of billed amounts for data roaming between March 1, 2010 and 22 February, 2012, paying financial compensation where appropriate. The operator must also apply the default spend cap to its customers on data roaming plans who have not opted out, by 22 February, 2012"
See a list of available solutions - here.
See "Vodafone to pay €400,000 data roaming charge in Ireland" - here.