I get a bunch of lines like ...
[Mon Jun 16 21:55:10 2003] Warning: file UIFiles\solaria\ not found in directory UIFiles\solaria\. Attempting to use file from Default skin.
[Mon Jun 16 21:55:11 2003] Warning: file UIFiles\solaria\ not found in directory UIFiles\solaria\. Attempting to use file from Default skin.
... and it spams the file like mad, that's where all the lag is coming from is because of the file system usage to spit that out.
I reverted back to my Drakah DAOC (with self mods) and *poof* gone. Have to love those -really- descriptive error messages, eh?