Mac OS X Samba issue

[Candlelight]

Up until a few days ago I could connect to networked computers (running mostly Windows Server 2003) without any issues. Then all of a sudden SMB has stopped working on my machine. When I try to connect it immediately fails and says

"There was an error connecting to the server XX.XXX.XXX.XXX.
Check the server name or IP address and then try again."

Now this problem only appears to be related to my 2011 Macbook Pro, all other machines in my office (who have older Macbook Pros) can connect fine. My Windows 7 on VMware on the same machine can connect fine. I still have internet connectivity. I get a green dot icon on my network (DHCP configures correctly) through ethernet. I can even ping the servers in question.

I checked my local smb.conf, comparing it to another machine in the office and it's identical. AFP still seems to be working.

Anyone have any ideas? The only things I can think that I did around the time things went belly up were install Symantec Endpoint Protection v12 (actually upgrade from the Beta) and Mac OS X 10.6.8. I have uninstalled SEP12 and it's still misbehaving. Next thing might be to roll back to 10.6.7 - is that even possible???

Any help greatly appreciated.

 

[Candlelight]

Ok... coincidentally we managed to fix the problem 5 minutes after I posted this.

There were a handful of plist files that retained network information that we trashed and restarted the machine, works fine now.

If anyone has this same issue, they are in USERS/<ME>/LIBRARY/PREFERENCES:

com.apple.recentitems.plist
com.apple.loginitems.plist
loginwindows.plist