Thanks for the feedback, Peninsula. I do actually carry my phone with the glass facing my leg (I usually wear jeans and it seems to me that the fabric of the lining is less abrasive than the denim). The visual appearance of the blob does accord with your description; it does seem that something is pressing from the back and pushing the LCD against the glass at that point. 'Massaging' from the back usually removes the blob in a few seconds. Usually when I press form the back in this manner (with the battery removed) each time I apply pressure the blob gets smaller until, after about five presses, it disappears completely. Currently there is no residue or evidence that it was there. It has happened about five or six times now and in all instances it has been in my pocket and the phone is likely to have been squashed slightly (e.g. when I squat down and the denim is pulled taught). It has never just appeared while I have been using the phone, so it is likely to be the squashing rather than just heat that causes it. I have always removed it by actively intervening, so could not say whether it clears up if I just leave the phone alone for a bit. The only time it did clear up without me mucking about with it is the time I left it on my dashboard (I didn't have time to be taking the back off and faffing about just then) and the blob had gone by the time I reached work. I couldn't say whether this would have happened had I just left it on a desk, or whether it was caused by the vibrations of the dashboard moving whatever is causing the pressure. The next time it happens I'll try just leaving it on a desk and see whether it goes away of its own accord.
As the blob appears to be in the same place for everybody, it seems likely to me that there is a particular component that causes it. Perhaps from a faulty batch, given that not everybody experiences it. I am considering reeturning it, but it has been almost two months now since I bought it and I am running B888, so would have to muck about a bit to get it to a returnable state.
Edited by Konstipated Kiwi, 12 June 2012 - 10:38 AM.