Now CM appear to have disabled their links to official roms, updates & kernels for older builds, I've mirrored them all on AndroidFileHost and put the links in one post so that they're easy to find.
There are different files for each ROM: signed fastboot flashable zips, signed zips, OTA incremental update zips., boot-debuggable images and stock recovery images.
Signed fastboot flashable zips: These contain the complete rom and can overwrite everything including your data partition. These cannot be flashed via recovery - extract their contents and flash via fastboot.
Signed zips: Normal recovery-flashable zips that contains just the system and kernel (they won't overwrite your data partition).
OTA incremental update zips: These are recovery-flashable zips that update your rom to a newer version. To check which version you are running, look at the ro.build.version.incremental line in your /system/build.prop file and then update incrementally.
Boot-debuggable images: These are boot images (kernels) that enable adb root and the developer menu options. To be flashed via fastboot.
Stock recovery images: These are stock recovery images which are recommended for applying OTA incremental update zips. To be flashed via fastboot.
Signed fastboot flashable zips
Signed zips
OTA incremental update zips
N/A
Boot-debuggable images
Stock recovery images
N/A
There are different files for each ROM: signed fastboot flashable zips, signed zips, OTA incremental update zips., boot-debuggable images and stock recovery images.
Signed fastboot flashable zips: These contain the complete rom and can overwrite everything including your data partition. These cannot be flashed via recovery - extract their contents and flash via fastboot.
Signed zips: Normal recovery-flashable zips that contains just the system and kernel (they won't overwrite your data partition).
OTA incremental update zips: These are recovery-flashable zips that update your rom to a newer version. To check which version you are running, look at the ro.build.version.incremental line in your /system/build.prop file and then update incrementally.
Boot-debuggable images: These are boot images (kernels) that enable adb root and the developer menu options. To be flashed via fastboot.
Stock recovery images: These are stock recovery images which are recommended for applying OTA incremental update zips. To be flashed via fastboot.
Signed fastboot flashable zips
Signed zips
OTA incremental update zips
N/A
Boot-debuggable images
Stock recovery images
N/A