Please be sure to read the Amazon release notes for 1.5 as it contains changes that are not backwards compatible. If you are using modules that depend on awssdk they may need to be updated in order to work with 1.5.x.
As part of the changes from Amazon a configuration setting has been removed and thus there is an update hook to remove the variable.
ccd25a4 Correct issue with 'compatibility test' link only work with/without clean-urls.
5b7da53 Add form elements to configure: aws_canonical_name, aws_certificate_authority, and aws_default_cache_config.
71ec511 Add basic compatibility test parsing for hook_requirements().
76bdc35 Update for 1.3.6.