Most of my users are on Office 2007, my SharePoint installation is 2010, and we all use IE8. I currently have "Require Check Out" on my document libraries set to "No". I have a page in one of my site collections which is essentially a list of hyperlinks to frequently used files by a specific department. When someone on Office 2007 clicks on any of the links, the file opens in the client application as Read-Only, which is fine. What is not fine is that the information bar that would normally allow you to click a button to enable editing of the document is not there.
What do I have to change to allow my users to edit documents when they've opened those documents with a link from a web page?
Edit: This is not an issue on my machine, which has Office 2010 installed.