Just signed up to say this problem has definitely not been solved. I have a Harpoon RGB Wireless and the double-clicking/multi-clicking started about a month ago (I bought it maybe 4 months or so ago).
I've tried everything in this thread but the double-clicking issue still persists, so I suspect it may be a hardware issue for me.
The double-clicking and multi-clicking while holding down the mouse happens seemingly at random, but it feels like it happens a lot more if I press around the middle of the left mouse button than if I press the outside edge or close to the middle mouse button. That being said, it can still happen pretty much anywhere I click, often at the most annoying of times.
I bought my mouse while I was overseas in Taiwan so I guess I have no hope of getting a replacement or refund. It's a shame, really, because I actually quite liked the mouse before this problem started and was going to recommend it to my brother and some of my mates, but this double clicking issue is so damn frustrating for both work and gaming that it completely ruins any redeeming quality that it has.
Hopefully Corsair takes this problem seriously and avoids it for future products.
