But again, here you are a shell script to fix the permission problems, also useful if you are building packages for your platform. Set the SDK_DIR variable accordingly to your installation.
#! /bin/bash
SDK_DIR=${SDK_DIR:-/opt/android-sdk-linux_x86-1.5_r2/}
sudo find $SDK_DIR/ -type d -exec chmod a+rx {} \;
sudo find $SDK_DIR/ ! -perm -044 -exec chmod g+r,o+r {} \;
Hope it helps.