I attended the SQL Saturday in Louisville last week and there was a presentation "Migrating to SSIS 2012" presented by Dave Fackler. The presentation is downloadable from:

I've had a similar issue. Try the following, not sure what your database name is, for example below yourdbname.

use yourdbname

go

sp_helpdb yourdbname

go

sp_spaceused @updateusage=true

go

/* Look at the name field to get...