SuperVillain UI 

v1.2.6
-Added ability to set vehicle bar other than bar 1.
-Added toggle for "!" aggro icon.
-Adjusted layout of auctionhouse skin.
-Fixed positioning of craft and fight o-matics.
-Internal improvements

Regarding Chat issues...

I have recently made MANY changes that will ensure that chat frames/tabs function the way that they are supposed to. If you are still having issues then here are a few things you should check/do.

IMPORTANT: If you are not experiencing issues and have your options set just how you want them then DO NOT PERFORM THE FOLLOWING ACTIONS.

PROBLEM A: I have been made aware of some occurrences where the Curse client is changing the folder permissions of files in the "WTF" directory. When this happens the game will still be able to read all saved variables but will no longer be able to save them. This causes any changes you made to vanish after relogging/reloading.

SOLUTION 1 (ADVANCED): You can attempt to change the permissions back to the way they were, they should match your "Config.wtf" file in the base WTF directory (this file doesn't seem to be affected by the permissions altering by the client). A quick web search should lead to instructions on how to do this.

SOLUTION 2 (ADVANCED): If changing permissions is not an option or doesn't work then the next thing will be to copy your WTF folder elsewhere (ie.. Desktop, My Documents ...etc). Now go through the ACTUAL WTF folder and delete ALL folders named "SavedVariables". Launch the game. Now log in then out of each character you had settings on. When finished, exit the game completely and re-open your WTF folder, also open the older WTF you just copied. The idea here is that you want to open each older savedvariables file in a text editor (ie.. notepad), copy the entire contents, then open the newer file respectively, delete all of its contents then paste the contents from the older file.
.... I hope that makes sense to some of you.

SOLUTION 3: If none of the above will work then unfortunately you will have to delete your "SavedVariables" files. This will allow the game to create new ones with the proper permissions.

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PROBLEM B: Over the course of the last few updates, it is possible that your savedvariables file has simply become too cluttered or corrupted.

SOLUTION: In this scenario, only one savedvariables file (SVUI_Chat) will have been affected. Go into your WTF folder and search that directory for files named SVUI_Chat, then delete all of them. Relaunch your game. Golden!

Both issues are spawning from the same cause. You are updating from Curse, which is fine but FightOMatic is not on Curse yet so it is now way out of date. Delete your copy of FightOMatic then download and extract this (wowinterface) version.

The style of coding used in Details makes external manipulation unreliable. I can get it to dock but the problem comes randomly during gameplay. For whatever reason, when Details sets off errors within SVUI, its catastrophic. I simply don't have the time needed to work out an acceptable solution for this addon.

I did try though....