Few weeks ago, had this happen to my rear screen....
Luckily covered by my insurance company for £75! (especially as it cost £1800 for the new glass) I had been having issues with my rear wiper not working which appeared to be due to corrosion, and this came, so I was extremely happy. It appears to be a newer design possible from the 997. Although I did have to wait 2 weeks for it to turn ups, so was carless.
All fitted and now Wiper working perfectly! Took autoglass 3 blokes and about 2 hours all in to fit it, as it wasn't lining up very well. Although they dropped the glass round earlier in the day and were promised cake so I believe this is why another guy turned up!
I also have had some issues with my Targa roof, which I've tried lubing the runners etc, but to no avail, basically the roof goes back ok, but doesn't come back up very easily, so after some googling found that another avenue to try is to lubricate the wires that move the roof up and down, unfortunately this means drilling into the sleeve that holds the wires, but thought what the hey. Managed to locate the sleeves and get the wires lubed up with penetrating oil. Took the car out, and voila roof working absolutely fine!
So overall a very productive day.