I have been running a mixture of faah and hdc tasks. On my machine, faah takes like 7 hours per unit to complete, and hdc 2:30 hours. They are different tasks altogether, with different requirements and completion times. However, when a faah task is completed, it drives the time of the waiting hdc tasks way up -- I have seen it go to 6:30 hours if a lot of faah tasks have been run without any hdc tasks in between. And, the other way round, hdc drives the faah estimates way down -- perhaps to 5 hours. This can cause problems with either too little work buffered (if estimates are low) or missed deadlines (if estimates are high)

This is not something major, but perhaps we could ask the BOINC developers to treat the two application types (faah and hdc) differently rather than have the one influence the other so much. Just a thought for the next release...