Rather lame that they did not forewarn advertisers that the conversion code would be changed during the upgrade process. I have lost conversion data for several days now while I was unaware of this issue.
I just got off a webinar with them. The old tracking codes will continue to work...for now. At some point, the old code will cease to function, but they said we will be given warning on this. My advice, take the time to make thatchange now.
The problem is that data was not transfered from the legacy system to tha new upgrade. Let's say you upgraded on December 15th. If you want to run a report for 2006 you need to get January 1, 2006-December 14, 2006 from the old system and Dec 15-31 from the new system and then add those numbers together.
I had to report to the director of marketing about the statistics from our Yahoo campagin and i even had to show him at my desktop that warning "The report is incomplete and some data has not been transferred....blah blah...we suck...blah..."
they couldnt believe that with yahoos technology and finances they couldnt find a programmer to create a data migration strategy for their PPC application....BOGUS!