There is another really funny bug that you can use to get rid of limitations around perkpass flights (read "avoid PP surcharge"), AFTER you have actually flown a leg of a PP award. I'm not sure if it still works, but if you have an open PP award and are Plat it's a free shot at getting some miles back. Here is how it works:

• Book your PP award (i.e., 240 US-ASIA WBC Award)
• Fly outbound leg (e.g., US--ASIA)
• Rebook return to any date that has PerkSaver availability using the online tool (obviously you cannot call in to have them do this )
• The tool will actually refund all of your miles and then rebook you as if both outbound and return are/were in PSaver.

So you in the US-ASIA WBC example, you'll see 240k returned to your account, but only 120 debited back out for the modified booking. I called TechSupport and told them about this, they didnt believe me that this actually happened and/or could be duplicated.