It should work fine, though we haven't been able to do an incredible amount of testing of 0.8.9 Viewer on iOS 4.2. You should be able to install and run it without a problem. If you do encounter any issues, let us know.
Strange... even tho I set the base SDK to 4.2 it is still showing as missing in the main Xcode view (Overview top left) so half the settings in project settings don't appear... other xcode projects build ok, the iphone viewer builds fine....
Comments
It should work fine, though we haven't been able to do an incredible amount of testing of 0.8.9 Viewer on iOS 4.2. You should be able to install and run it without a problem. If you do encounter any issues, let us know.
--Yodapollo