Yeah, if you Alt-Tab out of the game and come back, you'll see the following glitches:
- Players running prone or crouched
- Players killing you from behind walls
- Players killing you from a far map location
Those players are NOT hacking, it's a client side glitch which happens on your side only, so when one of those things happen, you're just not seeing the players where/how they should be.
To fix this, just record a demo and stop it. Here's a useful bind to record demos.
//Demo alias
alias demo "demostart"
alias demostart "record demoname; alias demo demostop"
alias demostop "stop; alias demo demostart"
bind "KEY" "demostart"
Press your bound key to start the demo, press it again to stop it. If you use this more than once you will, overwrite your demo, so if you want to keep a copy, you should go to:
*\Steam\steamapps\ACCOUNTNAME\day of defeat source\dod
and rename your *.dem file.