The game has a version for its addon functions. Currently the version is 40000.
Every addon has a toc-file where it tells wow for what version it was created.
If the addon has a different number than the current 40000 it is marked out of date no matter if it works with the current version or not. So if nothing is broken you can still use the addons. Just select the load out of date addons checkmark.
Here I have no problems with fluidframes and I use this version
http://www.wowinterface.com/download...uidFrames.html