I think we're all in the same boat with this - I was in the process of casting and contacting people all of which just vanished overnight. I wouldn't have minded so much if they'd sent a notification to warn of the impending "upgrade", I could have logged/copied the relevant messages etc.
As said by others here, it seems they're trying to shoehorn the Starnow site into the Backroom format and it's not going so well.
For me, the simplicity and functionality of the pre-revamp Starnow was its main attraction. I could do everything I needed/wanted to do in a very few mouse clicks - now even simple tasks are laborious and complicated with too many options and a very confusing and illogical interface. I endeavoured to list myself as a Photographer a few days ago - it is actually possible but it appears in the Crew options in a drop down menu (Roles/Skills) that includes every job imaginable - it took me 25 seconds just to scroll to the letter P (true).
On the upside; Some of my messages with other members have now re-appeared, but not all. Some of the listings under "Saved talent" have reappeared, but not all. Perhaps things will sort themselves out over the coming weeks, but I shan't get my hopes up.
My subscription was up for renewal anyway and so I've cancelled.
Edited by Simon Cole