...but not in Outlook

The custom entities I have created that have more than 50 or so records seem
to take forever to load in the browser when I'm looking at a view of "All
Active Custom_Entity". It takes up to two or three minutes, browser actually
goes into (Not Responding) condition, then finally loads.

When I look at the same type of view through the Outlook client it loads
within a couple of seconds. This is using the Desktop/Connected version of
Outlook, so it's not pulling from a local/offline database on the client.

Any known issues with this, or are there some db indexes that may need to be
added manually to custom entities in the db?

Thanks
Brian