Toyota replaced both rear windows free of charge on Tuesday - the design doesn't look any different, same surface area of glue. Have to assume process or glue has changed if what I was told about sorting a problem at the factory was identified and fixed, as I was told.
Anyway, have to say; credit where it's due. If Toyota are prepared to take safety matters seriously even on cheap 11 year old cars it does instil confidence in the brand. Mistakes happen, things are unforeseen, it's hard to test for 11 years in the future.
It did take a long time to get the windows, so if it's your only car and you can't fix your own window; you would need a solution to keep on the road for a while.