diff --git a/app/src/main/java/com/stevesoltys/seedvault/transport/backup/ApkBackup.kt b/app/src/main/java/com/stevesoltys/seedvault/transport/backup/ApkBackup.kt
index 60c9c9a..02208eb 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/transport/backup/ApkBackup.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/transport/backup/ApkBackup.kt
@@ -154,7 +154,8 @@
         streamGetter: suspend (name: String) -> OutputStream,
     ): List<ApkSplit> {
         check(packageInfo.splitNames != null)
-        val splitSourceDirs = packageInfo.applicationInfo.splitSourceDirs
+        // attention: though not documented, splitSourceDirs can be null
+        val splitSourceDirs = packageInfo.applicationInfo.splitSourceDirs ?: emptyArray()
         check(packageInfo.splitNames.size == splitSourceDirs.size) {
             "Size Mismatch! ${packageInfo.splitNames.size} != ${splitSourceDirs.size} " +
                 "splitNames is ${packageInfo.splitNames.toList()}, " +
diff --git a/app/src/main/java/com/stevesoltys/seedvault/transport/backup/BackupCoordinator.kt b/app/src/main/java/com/stevesoltys/seedvault/transport/backup/BackupCoordinator.kt
index ac77983..5d791fc 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/transport/backup/BackupCoordinator.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/transport/backup/BackupCoordinator.kt
@@ -381,7 +381,13 @@
                 }
                 // hook in here to back up APKs of apps that are otherwise not allowed for backup
                 if (isPmBackup && settingsManager.canDoBackupNow()) {
-                    backUpApksOfNotBackedUpPackages()
+                    try {
+                        backUpApksOfNotBackedUpPackages()
+                    } catch (e: Exception) {
+                        Log.e(TAG, "Error backing up APKs of opt-out apps: ", e)
+                        // We are re-throwing this, because we want to know about problems here
+                        throw e
+                    }
                 }
             }
             result
diff --git a/app/src/main/java/com/stevesoltys/seedvault/transport/backup/KVBackup.kt b/app/src/main/java/com/stevesoltys/seedvault/transport/backup/KVBackup.kt
index dd89cad..060f543 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/transport/backup/KVBackup.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/transport/backup/KVBackup.kt
@@ -209,6 +209,7 @@
             else state.db.close()
             TRANSPORT_OK
         } catch (e: IOException) {
+            Log.e(TAG, "Error uploading DB", e)
             TRANSPORT_ERROR
         } finally {
             this.state = null
diff --git a/app/src/main/java/com/stevesoltys/seedvault/ui/notification/NotificationBackupObserver.kt b/app/src/main/java/com/stevesoltys/seedvault/ui/notification/NotificationBackupObserver.kt
index 6eb6007..d35971f 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/ui/notification/NotificationBackupObserver.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/ui/notification/NotificationBackupObserver.kt
@@ -43,7 +43,7 @@
      * @param currentBackupPackage The name of the package that now being backed up.
      * @param backupProgress Current progress of backup for the package.
      */
-    override fun onUpdate(currentBackupPackage: String, backupProgress: BackupProgress) {
+    override fun onUpdate(currentBackupPackage: String?, backupProgress: BackupProgress) {
         showProgressNotification(currentBackupPackage)
     }
 
@@ -57,7 +57,7 @@
      *                  that was initialized
      * @param status Zero on success; a nonzero error code if the backup operation failed.
      */
-    override fun onResult(target: String, status: Int) {
+    override fun onResult(target: String?, status: Int) {
         if (isLoggable(TAG, INFO)) {
             Log.i(TAG, "Completed. Target: $target, status: $status")
         }
@@ -81,8 +81,8 @@
         nm.onBackupFinished(success, numBackedUp)
     }
 
-    private fun showProgressNotification(packageName: String) {
-        if (currentPackage == packageName) return
+    private fun showProgressNotification(packageName: String?) {
+        if (packageName == null || currentPackage == packageName) return
 
         if (isLoggable(TAG, INFO)) {
             "Showing progress notification for $currentPackage $numPackages/$expectedPackages".let {