Another big update, another cool gun (this is getting redundant)...

Added shotgun and super shotgun, available to revolver holders for a limited time

Took the SMG out of beta, now only available to donators

Removed death notifications for barrels blowing themselves up

Added fall damage, allowing for a new map "sb_yellobox"

Barrels can crouch to stop their player model from rotating

Added green text indicating position of last man standing to barrels

Added !thirdperson for humans. Plans to add custom player models as a donation reward.

Added proper hand models

Added !model to change your player model. Unique player models can be bought using !donate

Added !mute which brings up the normal gmod scoreboard for muting players

Added spawns to pyramid map (credit to TheHostileFart) making the map playable again

Added !tips to view all tips (also reformatted what tips look like)

Added two new player models: left shark and a tron legacy character.

Added custom taunts (surprise and sax), available using !donate

Another big update and another new gun!

Added SMG and super SMG

Added donation system

New players now spawn as barrels if a round is in progress

Fixed player names getting cut off in top left corner

"yalala" sound now cuts off if a barrel is killed mid sequence

Server now automatically checks for garry's mod updates on restart

Added afk kicking after a minute and a half of innactivity

Added anti-cheat system

Added !website, !forums, !revolver and !donate to view server related web pages in game

Big update for you guys including a new gun!

The changes include...

Complete code reworking

Added rank system (custom made for minimal overhead)

Added rank prefixes

Added rank member which can be unlocked by replying to this forum thread: {BAĞLANTI SİLİNDİ}www.tiny.cc/sbrevolver

Added rank moderator which can ban players and give people member rank

Added !id so users can report the Steam ID's of hackers

Added !kill and !suicide

Server now restarts at 2am every day

Added ban system that persists after server restart

Added moderator command !ban for getting rid of hackers

Added revolver gun (regular and super) unlocked only for players ranked member

Added back kill feed with working color

Added tips that display in the chat

Weapon switching now disabled 20 seconds into the round

Fixed the round timer (for real this time)

Here are the changes I've made so far from your suggestions and bug reports:

Fixed spectators spawning on round start

Fixed round timer

Removed all console errors

Lowered pistol accuracy slightly

Made 20% of total players start as barrels

Removed kill feed - hoping to add back in later

Humans turn into barrels when they suicide

Game ends properly if all barrels leave

Added AFK kicking system

*Hopefully* fixed players getting stuck on maps with too few spawn points

I had this same problem and was able to fix it by doing the following:

Go here
http://steamcommunity.com/my/myworkshopfiles/?browsefilter=mysubscriptions

And make sure you have no subscriptions to suicide barrels related addons.

This may fix the problem off the bat, but if it doesn't, do the following.

Find your garry's mod directory (where your single player maps would be stored) and check the following
1. addons folder has no barrels related content
2. In the "download" folder, the maps folder has no suicide barrels maps in it
3. In the "downloads" folder, the server folder has nothing in it (this is where the workshop content would be)

Doing this fixed the problem for me. If it doesn't for you, leave a reply so we can try and fix it for you.