I need the EXACT create index statement that you ran, the one that failed.
p.s. If you're partitioning on dates, partition RIGHT, not LEFT. Partitioning left with dates is horrid, and your partition function allows for some dates to slip into the wrong partition, because there are valid dates between 2011-05-31 23:59:59 and 2011-06-01 00:00:00.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability