In our 6.0 production instance we have several processes that interface with PPM to create timesheets from external systems. This is done via a database link, and calls to the KTMG_TIME_SHEETS_TH and KTMG_APPROVAL packages.
In 7.5 these packages are not present, probably because of the redone timesheet database schema. We need a way to interface with timesheet creation via a DB link in 7.5.
Support has indicated that this can be done in 7.5 via a professional services solution. We would rather not do that so we are probably going to write our own way to do this unless someone has a way to make the 6.0 stuff work.