Source: HL2Files.com

HL2Files.com reports that a website dedicated to solving the stuttering problem of Half-Life 2 has found a solution to the problem and it will be released soon:

A solution for the stuttering problem has been found and a fix is coming. I've been talking with Gary McTaggart about this today and it turns out that my texture management theory was correct. A patch will be coming for this issue that will load all of the required textures into video memory on level load, rather than doing it during game play. There is currently no ETA for this patch, but I will post an update as soon as I get more information.

So stay tuned for more on this.