Mysterious blue cursor

[Kman]

I actually get that all the time too, no idea what it is though. From what I've seen I think it has something to do with the create on surface function/other functions in the level editor that places something on a surface (like with decals), but that's just an observation. I also found that it seems to show up a lot more whenever I run into this certain map-wrecking glitch that's fucked me over many times in the past (though I seem to be the only person that gets it...).