I was having issues capturing my Voodoo2 SLI system with glide enabled, but they were fixed using the Startech VGA splitter with its "integrated booster circuit". The first issue fixed was intermittent horizontal warped tearing as seen below in the video and screenshot. It also did a decent job of cleaning up the typical vertical bars you can kind of see when capturing these cards.

Captured video with tearing issue: https://www.youtube.com/watch?v=JgmzvXiQWAE