Our site just finally completed a series of upgrades from DNN 3.0.1 to 4.8.0 and are now in the process of debugging the errors we caused along the way. Right now, I am stumped by a quirk in the Documents module, however.

I have one page visible only to a particular security group. This page has a documents module and no other content. The users in this security group were able to download documents before the upgrade, but now can only see the list - when a user clicks the "download" button, it triggers an error message reading "You Do Not Have Permission To View The Requested File." As admin, however, I can still download these documents.

I've double-checked, and the page security settings are still exactly as they should be. The module takes its permissions from the page settings. At what other level should I be checking/tinkering with my security so that those users who can see these documents can also download them?