Added warning to Sabnzbd Client Test to disable the sabnzbd pre-check option.

src/NzbDrone.Core/Download/Clients/Sabnzbd/Sabnzbd.cs

@@ -355,6 +355,7 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
         {
             failures.AddIfNotNull(TestConnection());
             failures.AddIfNotNull(TestAuthentication());
+            failures.AddIfNotNull(TestGlobalConfig());
             failures.AddIfNotNull(TestCategory());
 
             if (!Settings.TvCategoryLocalPath.IsNullOrWhiteSpace())
@@ -399,10 +400,25 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
 
             return null;
         }
+        
+        private ValidationFailure TestGlobalConfig()
+        {
+            var config = _proxy.GetConfig(Settings);
+            if (config.Misc.pre_check)
+            {
+                return new NzbDroneValidationFailure("", "Disable 'Check before download' option in Sabnbzd")
+                {
+                    InfoLink = String.Format("http://{0}:{1}/sabnzbd/config/switches/", Settings.Host, Settings.Port),
+                    DetailedDescription = "Using Check before download affects NzbDrone ability to track new downloads. Also Sabnzbd recommends 'Abort jobs that cannot be completed' instead since it's more effective."
+                };
+            }
+
+            return null;
+        }
 
         private ValidationFailure TestCategory()
         {
-            var config = this._proxy.GetConfig(Settings);
+            var config = _proxy.GetConfig(Settings);
             var category = GetCategories(config).FirstOrDefault((SabnzbdCategory v) => v.Name == Settings.TvCategory);
 
             if (category != null)

src/NzbDrone.Core/Download/Clients/Sabnzbd/SabnzbdCategory.cs

@@ -19,6 +19,7 @@ namespace NzbDrone.Core.Download.Clients.Sabnzbd
         public String complete_dir { get; set; }
         public String[] tv_categories { get; set; }
         public Boolean enable_tv_sorting { get; set; }
+        public Boolean pre_check { get; set; }
     }
 
     public class SabnzbdCategory

src/NzbDrone.Core/Download/DownloadTrackingService.cs

@@ -147,7 +147,7 @@ namespace NzbDrone.Core.Download
                             State = TrackedDownloadState.Unknown
                         };
 
-                        _logger.Debug("Started tracking download from history: {0}: {1}", trackedDownload.TrackingId, downloadItem.Title);
+                        _logger.Debug("[{0}] Started tracking download with id {1}.", downloadItem.Title, trackingId);
                         stateChanged = true;
                     }
 
@@ -157,17 +157,17 @@ namespace NzbDrone.Core.Download
                 }
             }
 
-            foreach (var downloadItem in oldTrackedDownloads.Values.Where(v => !newTrackedDownloads.ContainsKey(v.TrackingId)))
+            foreach (var trackedDownload in oldTrackedDownloads.Values.Where(v => !newTrackedDownloads.ContainsKey(v.TrackingId)))
             {
-                if (downloadItem.State != TrackedDownloadState.Removed)
+                if (trackedDownload.State != TrackedDownloadState.Removed)
                 {
-                    downloadItem.State = TrackedDownloadState.Removed;
+                    trackedDownload.State = TrackedDownloadState.Removed;
                     stateChanged = true;
 
-                    _logger.Debug("Item removed from download client by user: {0}: {1}", downloadItem.TrackingId, downloadItem.DownloadItem.Title);
+                    _logger.Debug("[{0}] Item with id {1} removed from download client directly (possibly by user).", trackedDownload.DownloadItem.Title, trackedDownload.TrackingId);
                 }
 
-                _logger.Debug("Stopped tracking download: {0}: {1}", downloadItem.TrackingId, downloadItem.DownloadItem.Title);
+                _logger.Debug("[{0}] Stopped tracking download with id {1}.", trackedDownload.DownloadItem.Title, trackedDownload.TrackingId);
             }
 
             _trackedDownloadCache.Set("tracked", newTrackedDownloads.Values.ToArray());