» Tue Dec 14, 2010 2:37 pm
In the UOP package, under the meshes directory (first level, directly under meshes, not under any sub directories) there should be a file called "marker_error.nif".
It replaces the weird "yellow coffin" marker with a much smaller one that says "WTF! I'm a Missing Mesh", and is designed to point directly at the actual missing item.
If you don't have that, I have to wonder if you have the complete UOP package, which weighs in at 128MB of data, or just one of the updates or hotfix patches.
http://www.tesnexus.com/downloads/file.php?id=21862 & http://www.tesnexus.com/downloads/file.php?id=16704 are both OBSE based mods that allow you to click on just about any item in the game and get a detailed report on which mod added it, and which mod last altered it. Very useful for bug finding.
All Natural - Real Light must add a light emitting source at that location in order to compensate for the removal of "ambient" lighting. Probably what you are missing is a particle effect, or fake light column that Oblivion sometimes uses.
Make sure you installed any resources that are need for "Real Light" to work.