Since the March 5th update there has been alot of mix up with Courch+jump and Jump+crouch. It may not seem as a big deal but it is. The Crouch+Jump exploit was a exploit almost a year back where you litter crouched and then with the right timing jumped. This would make you non collisionable with map brushes, this means you where able to put Teleports and advance to get to highly exploitable spots. For example skywalking on Dustbowl. Here is a video of the ol' days [ame="http://www.youtube.com/watch?v=4F_SNuFi3ks"]http://www.youtube.com/watch?v=4F_SNuFi3ks[/ame] As you can see, this exploit got very well know after a while. Each server I joined, there was atleast 1 player that did something like this, went under the map, trapped players, skywalking ect. Jump+Crouching is when you jump and then crouch to get to higher spots. For example getting ontop of your sentries. This is not a exploit since valve really never fixed it. It has pleased players since Half-Life 2 and noone really mind it. But now, Valve has removed this, for unknown reasons and now everyone is hating them. So please keep this in mind. There is major difference between these two. And most already have them mixed up, correct them if you wish.