Silencer does not improve accuracy, but spoil it (because of slower speed of the shell) ;)

Checked this today. Confirmed

I checked this with my friend - body disappear in exacly moment of disconecting dead player.

Example:
He kill me and see my dead body. The body disappear when i disconnect from the server.

Confirmed.

The same when you empting magazine outside of character slots (for example: when you empting magazine that lay on the ground).

The problem exists but your solutions are not good :(

Confirmed. I noticed this today too.

Guys, it's the problem with connection between server -> cloud (main database).
Probably server is overloaded and doesn't sent your positions to the cloud. Just try to change the server if you looking for instant help ;)

Confirmed. I have the same problem with standalone.

The same problem. I don't know if player disconnected or body disappear.

! SOLUTION ! SOLUTION ! SOLUTION ! SOLUTION ! SOLUTION ! SOLUTION !

Go to DayZ config file (for example: C:\Users\YOUR_PC_PROFILE\Documents\DayZ)
Open DayZ.cfg with notepad.
Change:
GPU_MaxFramesAhead=1000;
to:
GPU_MaxFramesAhead=1;
Save it and HAVE FUN! :)

! SOLUTION ! SOLUTION ! SOLUTION ! SOLUTION ! SOLUTION ! SOLUTION !

I found a "solution" for people with SSD or more RAM.
Try to install DayZ on SSD or RAMDisk: http://blog.laptopmag.com/wpress/wp-content/uploads/2012/07/ramdisk-charts.jpg
I think the main problem is with slow accessing data from the hard drive. Maybe they need to keep more data in the RAM, not in HDD.

I got from this about 10-15fps more. Not perfect, but very helpful in the cities.

The main problem is with high-rise building like:
http://media.pcgamer.com/files/2013/05/DayZ-Standalone1.jpg

It's very important to repair this! I have the same problem and going to the city makes game not playable.

Computer specs:
Windows 7 64 (on SSD)
16GB RAM (DDR3)
Intel Core i7-2600 CPU @ 3.40GHz
GeForce GTX 570

Get the same sounds on airport in Balota. I'm sure there was nobody drinking, beacuse i Was on the middle of the airport in the daylight.
Sound repeat few time.