What happens when you bless the chameleon boot partition using the terminal (so that the machine automatically selects it on startup) and then edit Org.chameleon.Boot.plist to point to the Mavericks partition?
Edit: So, it's all working ok now?
Thanks for chiming in.
It is booting and working no problem again. I never did have any issues installing, running and what not (other than trying to get the old 3870 to show proper 23" Cinema Display resolution - that was a fail, but with a 5770 it's all good).
I did not retouch chameleon or Mavericks (that's my HD name) after installation.
My problem is this: I have a Windows partition on a hard drive, which is now out of the MacPro.
IF i place it back in: I hold option at startup, pick EFI Boot (or Mavericks, it doesn't matter) and now instead of booting Mavericks, it tries to boot Windows and crashes to a blue screen of death (with a lot of writing on it).
IF I hold option and select Windows as a startup disk, then it boots in Windows no problem and Windows works.
IF I remove the Windows disk again, EFI Boot will hang or not work, but if I boot off Lion and then re-bless the Startup Disk (shows up as EFI Boot when holding option down), then I am able to boot Mavericks again.
I read about it, I tried to go into Windows and either use DiskManagement or DiskPart to set the Mavericks partition as active, but it would not do that since the Mavericks partition is GUID.
I re-did everything trying to set the Mavericks partition to MBR, but the Mavericks installer will not install into MBR (at least the one I have).
I re-partitioned the drive again as GUID and repeated all the steps and I'm back in Mavericks.
Sorry for the long explanation.