autosave missing

Unable to reproduce in 13w17a:
Console output:

Client> 2013-04-30 00:27:10 [SERVER] [INFO] Starting integrated minecraft server version 13w17a
Client> 2013-04-30 00:27:10 [SERVER] [INFO] Generating keypair
Client> 2013-04-30 00:27:11 [SERVER] [INFO] Preparing start region for level 0
Client> 2013-04-30 00:27:12 [SERVER] [INFO] Preparing spawn area: 17%
Client> 2013-04-30 00:27:13 [SERVER] [INFO] Preparing spawn area: 55%
Client> loading single player
Client> 2013-04-30 00:27:14 [SERVER] [INFO] Tails_D[/127.0.0.1:0] logged in with entity id 452 at (-188.2751840772607, 68.0, 148.4856757188314)
Client> 2013-04-30 00:27:16 [SERVER] [INFO] Saving and pausing game...
Client> 2013-04-30 00:27:16 [SERVER] [INFO] Saving chunks for level 'Test World'/Overworld
Client> 2013-04-30 00:27:16 [SERVER] [INFO] Saving chunks for level 'Test World'/Nether
Client> 2013-04-30 00:27:16 [SERVER] [INFO] Saving chunks for level 'Test World'/The End
Client> 2013-04-30 00:27:25 [SERVER] [INFO] Saving and pausing game...
Client> 2013-04-30 00:27:25 [SERVER] [INFO] Saving chunks for level 'Test World'/Overworld
Client> 2013-04-30 00:27:26 [SERVER] [INFO] Saving chunks for level 'Test World'/Nether
Client> 2013-04-30 00:27:26 [SERVER] [INFO] Saving chunks for level 'Test World'/The End
Client> 2013-04-30 00:27:28 [SERVER] [INFO] Saving and pausing game...
Client> 2013-04-30 00:27:29 [SERVER] [INFO] Saving chunks for level 'Test World'/Overworld
Client> 2013-04-30 00:27:29 [SERVER] [INFO] Saving chunks for level 'Test World'/Nether
Client> 2013-04-30 00:27:29 [SERVER] [INFO] Saving chunks for level 'Test World'/The End
Client> 2013-04-30 00:27:31 [SERVER] [INFO] Stopping server
Client> 2013-04-30 00:27:31 [SERVER] [INFO] Saving players
Client> 2013-04-30 00:27:31 [SERVER] [INFO] Saving worlds
Client> 2013-04-30 00:27:31 [SERVER] [INFO] Saving chunks for level 'Test World'/Overworld
Client> 2013-04-30 00:27:31 [SERVER] [INFO] Saving chunks for level 'Test World'/Nether
Client> 2013-04-30 00:27:31 [SERVER] [INFO] Saving chunks for level 'Test World'/The End
Client> 2013-04-30 00:27:33 [CLIENT] [INFO] Stopping!

Unable to reproduce? pause the game and look at whats missing.

I'll give you a hint. it was on the bottom left corner.
plus your test was a server, I'm talking single player, your argument is invalid.

As you can see from the console output:

Client> 2013-04-30 00:27:25 [SERVER] [INFO] Saving and pausing game...
Client> 2013-04-30 00:27:25 [SERVER] [INFO] Saving chunks for level 'Test World'/Overworld
Client> 2013-04-30 00:27:26 [SERVER] [INFO] Saving chunks for level 'Test World'/Nether
Client> 2013-04-30 00:27:26 [SERVER] [INFO] Saving chunks for level 'Test World'/The End

The game already autosaves when pausing.

Again a server is much different.

Client> 2013-04-30 00:27:10 [SERVER] [INFO] Starting integrated minecraft server version 13w17a

That's singleplayer. In case you didn't know since 1.3 Minecraft simulates a server in singleplayer.

riddle me this then, why is the save message after pausing the game gone?

and yes I know Sp and Mp are now one.
P.S. no disrespect just want to know.

Probably for the same reason the loading bar is gone (MC-2681).
So if this is about the autosave message then I guess this might be a valid bug report.

It wasn't the message. I was hoping I found why some peoples worlds rollback randomly.(including mine)
It started sense 1.3 and that was the only thing I noticed that changed sense 1.2.5
if this isn't thou what could it possibly be?

The missing loading bar when creating or entering a world.

The not saving could also be caused by a virus scanner as described in MC-12058.

I don't see how that could be it. at least on my end anyway. plus it still leaves the question. Why is only affecting versions after 1.2.5? I downgraded and never had the problem in the older versions.
P.S. I'm not ruling out that a virus scanner could be it. I just don't see how thou.