It seems that the last version of the ADT behaves slightly different from the previous versions and may involve changing code. One of the changes that I have seen is that you must explicitly disable formatting in the strings.xml files if you have more than one placeholder that you will use from code (like %s).
The other one was discovered by one of the OTempo users (Jose Miguel). It seems that ADT can not package correctly the resources if there is a folder called “drawable-mdpi”. This is odd, because “drawable” is for density independent images, not mdpi ones. This behaviour seems to affect only Android 1.5 devices, as I could not reproduce it on 1.6, 2.1 or 2.2.
I think that I will have to learn to live with this, at least until the last Android 1.5 user migrates or changes its phone.
Expect a new version of OTempo in the following hours.