Today, i tried to update the Android tools i use on Eclipse to version 8.0 and the Android SDK to version 2.3. This caused a loss of adb from tools directory. I managed to retrieve it again and put it back. Then, i searched the forum and found this, that eventually helped me to solved it, by updating the Eclipse first.
So, why is there no warning of proceeding to Android tools update, without updating the Eclipse first, can cause this kind of troubles?
It could have saved some time...