WowAce

What is the enhancement in mind? How should it look and feel?

It should be possible to disable scrolling through chat tabson mouseover in the options menu.

Please provide any additional information below.

It interrupts my gameplay if I have to see something in the chat while in combat as I suddenly stop casting due to the scrolling feature (spells bound to scroll wheel).

I find it disconcerting to see the tabs flipping like mad because my Logitech Revolution mouse wheel is freewheeling when I move the mouse out of the chat area after having free-wheeled to get to the bottom of the chat. (Is there a hotkey to jump to the end? There's no icon to the left of the frame for that like there is with the built-in chat frame. Having a small button to do that would be nice.)

I don't need mousewheel tab selection, and would be happy to leave that permanently disabled.

You can scroll the current chat frame by pressing the PageUp/PageDown keys on your keyboard and additionally, Shift+PgUp/PgDn will immediately scroll to the top/bottom.

Note that with having the mousewheel assigned for a general scrolling function, Shift+Mousewheel will show the same behaviour as Shift+PgUp/PgDn

Also, enabling the option "Show bottom when scrolled" in the Disable Buttons module might help, as well as completely disabling the Mousewheel Scroll module and just using the above mentioned keys for scrolling. Just an idea.

I don't think there's been an official fix to this yet, but I disable this by having the following run when the UI loads:

local ctMod = Chatter:GetModule("ChatTabs", true)
if ctMod ~= nil then
    ctMod.OnMouseWheel = function(frame, dir) end
end

The way I have this run is through a little custom add-on with Chatter listed as an optional dependency.

Now to solve the problem of the scrolling interrupting your casts you may have to do something else: Remove every occurrence of self:HookScript(tab, "OnMouseWheel") from ChatTabs.lua. However, if you do this you need to be careful about having these changes undone when you upgrade your add-ons.