I have upload version 1.203 which includes all the changes from this weeks calibre release, and also a couple of extra goodies for all you faithful beta testers:
1) Support for MTP devices on OS X
2) Support for converting cbz/cbr files that have images in the webp format
http://download.calibre-ebook.com/betas/
The support for MTP devices is experimental, the last time I tried it, it caused high CPU usage/hangs on some OS X computers. Since then the underlying library (libusbx) has had many fixes, so I am hoping it is more stable now. However, if it still causes problems, I will take it out again.