Bottom line - use ScrollFrames for large images or blocks of text, but not for a large number of multi-textured relatively-positioned controls.

Be sure to check out SCTD 2.0 if you want SCT to show your damage. Please read and use the main SCT site for news, bugs, and feature requests. Surprisingly, though, text does NOT suffer much. Adds Scrolling Combat Text above your character. Now when the 0-1 texture coordinates suffer from precision errors, everything starts to shake. Speculation here - apparently this happens because ScrollFrames are (seemingly) created by rendering all their content onto a texture in memory, and treating the ScrollFrame's ScrollChild as a mere Texture, taking its contents from the in-memory texture using SetTexCoord. And 'fidgeting' may mean quite serious distortions, with textures shifting up to 3-4 pixels in an unpredictable direction.

Notice: Multiple textures, positioned one to another, may start 'fidgeting' when the ScrollFrame's ScrollChild containing them is resized/moved/scrolled. Scroll frames are good for scrolling large portions of text, or a large EditBox. such as third-person shooters and side-scrolling platformers. Lets the user change the position of the built in Combat Text (WoW) Raw. ScrollFrames are for smooth pixel-by-pixel scrolling of a complete frame that is only partially visible. Defense of the Ancients (DotA) is a multiplayer online battle arena (MOBA) mod for the video game Warcraft.

If all you are trying to accomplish is offsetting a list in an array of buttons/fontstrings, as is often the case, all you really need is a Slider. In many cases, ScrollFrames, and in particular the FrameXML-defined FauxScrollFrame, does more than you need.

Wow scrolling combat text