I recently tried to install EQ Titanium on Virtual Box (4.3.12 from wheezy-backports) to play on the Project 1999 emu server. After checking '3d graphics', installing DX9, and installing the guest additions in safe mode everything works great - except the avatars. I can log in and run around and see all of the scenery and perform all of the usual game actions, but my character (and all of the other PCs and NPCs) are completely invisible except for his weapons.
I am currently playing on Wine, which actually had exactly the same problem. With Wine I could fix it by disabling vertex shaders, but that doesn't work for VirtualBox. Does anyone have suggestions?