[emilj]

There is a brand new update that I installed yesterday, and it turns out Rovio have now broken this feature in a much more serious way. Namely, it now registers as a power-up as witnessed by a flash next to the score, however it does so not just if you use this feature, but always after the “Continue playing?” message was shown, even if you declined it (using the cross in the corner or a device back-button). This makes it effectively impossible to produce power-up free high-score screenshots for levels where this feature is offered, which is basically wherever you need to use all birds.

EDIT: As jrsquonk notes below, it sometimes happens even if the level is finished with some birds left, which makes the problem even worse.