Problem: Customer discovered that the ULS logs had stopped generating. Within the Logs file there were files but from an old date.

Troubleshooting: I looked in Event viewer and found this:

Tracing Service failed to create the trace log file at location specified in SOFTWARE\Microsoft\Shared Tools\Web Server Extensions\14.0\LogDir Error 0x0: The operation completed successfully. . Traces will be written to the following directory: C:\Windows\SERVIC~2\LOCALS~1\AppData\Local\Temp\.

Resolution:

1. In Central Admin go to Monitoring>>Configure diagnostic logging
2. changed the ‘Path’ value to C:\Temp and then back to D:\SharePoint\Logs or %CommonProgramFiles%\Microsoft Shared\Web Server Extensions\14\LOGS\, or whatever it was before! (changing it back and forth resolved this problem) 

The Event Log should stop reporting this error!

Had an issue with Audiences in Sharepoint 2010, Kept getting the error “There were problems searching audience, please contact the system administrator.” whenever I tried to add/target an audience in my Sharepoint 2010 in the Top Navigation.

What this error normally/really means is that Sharepoint cannot connect to the User Profile Service Application Proxy (You would get a similar error if your Enterprise search was trying to crawl your user profiles) or the User Profile Synchronization Serive (UPSS), which was my case.

To fix this you need to

1. Open “Central Administration”
2. Click “Application Management”
3. Click “Manage Web Applications”
4. Find and click on the “Web Application” or “Website” you are getting the error in (in my case ‘sharepoint -80′)
5. Click “Service Connections” under the “Manage” ribbon
6. Make sure that “User Profile Service Application” is checked (you may have to change from default to custom to be able to do this). This MIGHT be unchecked if you have recently deleted the default User Profile Service Application and created a new one using a different name, like I did, AND the Connection is NOT set to Default!!