The processes including non pulse stuff had 100% cpu utilization in total. Afraid I don't have too much to go on, the only thing in the log was this.
03/11/2013 14:24:05 -- Errors -- Error saving object of type 'Pulse.Base.PictureList' to file 'C:\Pulse\Cache\CACHE_-640764800_LocalDirectory.Provider.xml'. Error Details: System.IO.IOException: The process cannot access the file 'C:\Pulse\Cache\CACHE_-640764800_LocalDirectory.Provider.xml' because it is being used by another process.
at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize)
at Pulse.Base.XmlSerializable`1.Save(String path) in c:\Code\Pulse_Code\Pulse\Pulse.Base\XmlSerializable.cs:line 18
Tried exiting with the tray menu. It didn't close for a minute so had to end the task in task manager.
Could add it wasn't changing wallpapers during this time. Maybe it got caught in an infinite loop somehow?