That day has yet to come!!
I found myself googling 'Ashtanga yoga with knee injury' this morning (well, it's pretty slow at work at the moment!) Anyway I came up with a hit on Matthew Sweeney's site. After his other books, there was a downloadable 'Primary and Intermediate Knee Sequence' - "for those students who have ongoing knee issues or a knee injury. It combines both the Primary and Intermediate Series while omitting all the postures that compress or endanger the knees". So of course I downloaded it immediately (only $AU5).
Very interesting - it seems to have (almost) all of standing in, then after Purvottanasana it skips straight to Navasana, and then everything seems to be in there. (Don't know about the 2nd series poses as I'm not doing them. Doesn't start with Pasasana - Salabhasana is the first 2nd series listed.) The main surprise to me was Baddha Konasana seems to be considered OK. Don't know whether my osteopath will agree - but I'm certainly going to take this in to show her!!
Seemed like said knee went a bit backwards this week (probably caused by me overdoing things last weekend!) But when I saw the osteopath yesterday, she said it was to be expected. And then after she'd treated it she told me that it responds really really well to treatment, and she feels fairly sure that it should clear up in the next few weeks, without any medical intervention! She did however tell me, no yoga for at least another couple of weeks! ((scream!@#!))