An anonymous reader writes "On Thursday we discussed news that Google pressured Acer and Chinese e-commerce giant Alibaba to cancel the launch of a phone running the Aliyun OS. Google has now addressed the issue, speaking out on the importance of compatibility for Android devices. Andy Rubin, who runs Android development at Google, said Aliyun was a non-compatible version of Android, which weakens the ecosystem. He pointed out that the Open Handset Alliance provides all the tools necessary to make it compatible. An Alibaba exec fired back, saying, 'Aliyun OS is not part of the Android ecosystem so of course Aliyun OS is not and does not have to be compatible with Android. It is ironic that a company that talks freely about openness is espousing a closed ecosystem.'"