The most recent leak that works with themes is .151 (works with the majority of them. Very few that don't). The last official that works with ALL themes is .148.
4.7 builds
.148 and below: Themes are compatible, but they are big culprits for slowing your phone down and causing memory leaks. This applies even if they are not active.
.151 : Many themes work, but they need to be .151 compatible or they really mess up your phone requiring special techniques to fix (Safe mode delete or more extreme methods) The compatible ones do work nicely, not really slowing down the phone and not leaking memory anymore.
.16x and .17x: Themes are broken. Themes are going to give you tons of headaches receiving, viewing, and deleting messages. DON'T USE THEM! Go back to Precsions Zen Default and do a battery pull to fix you issues and delete your theme since you can not use it on these builds.
5.0 builds:
.140 and .154 : Themes are broken. Themes have the same issues as 4.7 .16x 1nd .17x builds regarding messages. DON'T USE THEM! Go back to Precsions Zen Default and do a battery pull to fix you issues and delete your theme since you can not use it on these builds.
.191 and .230: Themes finally work again. This build has the most compatible themes of any post 4.7 .148 build . A few problems (mostly cosmetic I think) possibly caused by changes in the default zen theme that are no big deal however and some themes do have issues (unconfirmed).
On .230 I had a theme issue where the flick scrolling was messing me up from scrolling to the bottom of the applications list. It would bounce before it got to the bottom. Only happened on one theme though.