I found Following Errors in Log...
UserAgent not available, file operations may not be optimized. at Microsoft.SharePoint.SPFileStreamManager.CreateCobaltStreamContainer(SPFileStreamStore spfs, ILockBytes ilb, Boolean copyOnFirstWrite, Boolean disposeIlb) at Microsoft.SharePoint.SPFileStreamManager.SetInputLockBytes(SPFileInfo& fileInfo, SqlSession session, PrefetchResult prefetchResult) at Microsoft.SharePoint.CoordinatedStreamBuffer.SPCoordinatedStreamBufferFactory.CreateFromDocumentRowset(Guid databaseId, SqlSession session, SPFileStreamManager spfstm, Object[] metadataRow, SPRowset contentRowset, SPDocumentBindRequest& dbreq, SPDocumentBindResults& dbres) at Microsoft.SharePoint.SPSqlClient.GetDocumentContentRow(Int32 rowOrd, Object ospFileStmMgr, SPDocumentBindRequest& dbreq, SPDocumentBindResults& dbres...
...) at Microsoft.SharePoint.Library.SPRequestInternalClass.GetFileAndMetaInfo(String bstrUrl, Byte bPageView, Byte bPageMode, Byte bGetBuildDependencySet, String bstrCurrentFolderUrl, Int32 iRequestVersion, Byte bMainFileRequest, Boolean& pbCanCustomizePages, Boolean& pbCanPersonalizeWebParts, Boolean& pbCanAddDeleteWebParts, Boolean& pbGhostedDocument, Boolean& pbDefaultToPersonal, Boolean& pbIsWebWelcomePage, String& pbstrSiteRoot, Guid& pgSiteId, UInt32& pdwVersion, String& pbstrTimeLastModified, String& pbstrContent, UInt32& pdwPartCount, Object& pvarMetaData, Object& pvarMultipleMeetingDoclibRootFolders, String& pbstrRedirectUrl, Boolean& pbObjectIsList, Guid& pgListId, UInt32& pdwItemId, Int64& pllListFlags, Boolean& pbAccessDenied, Guid& pgDocid, Byte& piLevel, UInt64& ppermMask, ...
ProfileImagePicker.SaveFileToPersonalSite(): Microsoft.Office.Server.UserProfiles.UserProfileApplicationNotAvailableException: UserProfileApplicationNotAvailableException_Logging :: UserProfileApplicationProxy.GetRawPartitionID has null proxy at Microsoft.Office.Server.Administration.UserProfileApplicationProxy.GetRawPartitionID(SPServiceContext serviceContext) at Microsoft.Office.Server.UserProfiles.ProfileManagerBase..ctor(SPServiceContext serviceContext) at Microsoft.Office.Server.UserProfiles.ProfileManagerBase..ctor(SPServiceContext serviceContext, Boolean ignorePrivacy) at Microsoft.Office.Server.UserProfiles.UserProfileManager..ctor(SPServiceContext serviceContext, Boolean IgnoreUserPrivacy, Boolean backwardCompatible) at Microsoft.Office.Server.UserProfiles.User...
ProfileImagePicker.SaveFileToPersonalSite(): Microsoft.Office.Server.UserProfiles.UserProfileApplicationNotAvailableException: UserProfileApplicationNotAvailableException_Logging :: UserProfileApplicationProxy.GetRawPartitionID has null proxy at Microsoft.Office.Server.Administration.UserProfileApplicationProxy.GetRawPartitionID(SPServiceContext serviceContext) at Microsoft.Office.Server.UserProfiles.ProfileManagerBase..ctor(SPServiceContext serviceContext) at Microsoft.Office.Server.UserProfiles.ProfileManagerBase..ctor(SPServiceContext serviceContext, Boolean ignorePrivacy) at Microsoft.Office.Server.UserProfiles.UserProfileManager..ctor(SPServiceContext serviceContext, Boolean IgnoreUserPrivacy, Boolean backwardCompatible) at Microsoft.Office.Server.UserProfiles.User...
[Forced due to logging gap, cached @ 01/20/2014 10:37:39.87, Original Level: Verbose] url is in site