I just wanted to make sure everyone was aware that we have posted an update to the Flex 3.5 SDK that went out in December. This update addresses a critical bug with the AIR auto-updater UI (SDK-24766). The fix has been posted in a rebuild of the 3.5 SDK called 3.5a and can be found here (under the Latest Milestone Release Builds table).
We encourage all developers using the 3.5 SDK to updgrade to 3.5a for continued development. The fix that went into this updated build does not affect the signing and caching of the 3.5 RSLs that went out with the original 3.5 SDK in December.