Every once in a while the ULS viewer will throw this error message:

An SPRequest object was reclaimed by the garbage collector instead of being explicitly freed.  To avoid wasting system resources, dispose of this object or its parent (such as an SPSite or SPWeb) as soon as you are done using it.  Allocation Id: {057C0995-CC5A-4652-B5A3-48B46A225269}  To determine where this object was allocated, set Microsoft.SharePoint.Administration.SPWebService.ContentService.CollectSPRequestAllocationCallStacks = true.

The following Powershell script will enable the CollectSPRequestAllocationCallStacks:

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue
[System.Reflection.Assembly]::LoadFile($Env:CommonProgramFiles+"\Microsoft Shared\Web Server Extensions\14\ISAPI\Microsoft.SharePoint.dll") | out-null

# Get Content Service of the farm
$contentService = [Microsoft.SharePoint.Administration.SPWebService]::ContentService

# Display and change the setting of property "CollectSPRequestAllocationCallStacks"
write-host "Current: " $contentService.CollectSPRequestAllocationCallStacks
$contentService.CollectSPRequestAllocationCallStacks = $true

write-host " New: " $contentService.CollectSPRequestAllocationCallStacks