Why does it seem like everyone is moving to those curved tabs? They've always seemed like a waste of space and the overlapping bits make for an inconsistent tab UI.
Old: http://cl.ly/image/221j3J1j3R2Q New: http://cl.ly/image/1b1j1m2K2k24
The old one is showing 13 tabs, the new one is showing 12 tabs and the edge of the 13th one. However, the new one is way less cluttered and easy to read IMO.
Open 4 tabs. click tab 1 and then tab 3. What order do you display the tabs in? Does tab 1 overlay tab 2? If closing tabs don't to the last open tab this now means that the visual stack is not accurate to how the program operates.
I understand the depth but there are better ways to show it that don't take up as much space nor have to deal with issues like visually showing the tab's z-order