To answer your first question, yes the client side UI will be "blank" now unless there are patches that are scheduled to be installed. Here is the documentation that explains the change:
http://www.symantec.com/business/support/index?page=content&id=TECH147912
Now, for your second issue (Retrying), I would look at the Altiris Agent logs, which should give you an idea of what is wrong. Either the patch agent is unable to download the updates due to connectivity issues, or it just simply doesn't know where to download the updates from (i.e. missing source paths). If the problem doesn't resolve itself over a few hours, then I would delete the config policy from the client and try requesting configuration again (it will recreate the config policy automatically).