theme problem in elgg 1.6

Hello everyone,

I am having problems adding themes to my elgg 1.6 site. I have tried adding themes after a site upgrade and also with a fresh install of elgg 1.6. The themes I have installed either come up with an incorrectly configured plugin error or they completely mess up the look of the site to the point where it is unusable. Do 1.5 themes not work properly with 1.6?