Yes.....I cannot access one of my bookings and it has been like it for a week now.
It's the only booking that isn't a straightforward return and includes a codeshare AA leg.

I did raise this on the relevant thread but no response. I called BA a couple of times yesterday, once I was told by the Indian call centre that it was a glitch cause by equipment change ( I found this hard to believe as the equipment hasn't changed recently but about 2 months ago) I phoned again and spoke to Newcastle this time I was told it was a known problem that they were working on as it had affected a number of bookings and should be OK in about 5 days.
I won't hold my breath :-/