Thanks for your replies so far.
I need to point out that this is not an issue with the elbow, it is the actual rectangular air outlet tabs. Once they have popped out they can't be properly replaced in position. The tabs are actually broken, not just out of place. The mask is therefore unusable.
I just attempted to post a photo that I took to illustrate exactly what the issue is but got a message saying that I can't post photos until I have at least 8 posts (which is sort of unfortunate because I would have had that many posts on the previous website, but not on the revamped one).
Without the photo I don't think it will be clear to most people exactly what the problem is.
Go see your Doc Or better still if you have a sleep center near bye
sure you will get helped out
Thanks Ugly. I did get a new mask, or actually just the cushion part of it since everything else is fine.
The defective mask has been returned to see if they will replace it under warranty, although it is past the 3 month warranty period. This is the second time this has happened to me and they did replace the first one free of charge. It seems strange that this has happened to me twice now and yet no one else on this forum seems to have had the same problem.
Unfortunately in Australia we get ripped off bigtime on prices of many things. The replacement mask cost me $90 whereas the same thing is available on Amazon for around $27 (but they won't ship to Australia). If the company do come good with a replacement under warranty then it will mean that I have a spare which I figure is essential in case this happens again, particularly on a weekend or when travelling in an area where a replacement isn't readily available.