The app/service crashes on sync when using a design with app icons.
You could try for example with "Onze".
W/StatusBarIconView( 1192): No icon for slot fr.unix_experience.owncloud_sms/0x0
E/AccessibilityNodeInfoCache( 1693): Node from: 201 not from:190 android.view.accessibility.AccessibilityNodeInfo@1780e; boundsInParent: Rect(0, 0 - 446, 73); boundsInScreen: Rect(72, 542 - 518, 615); packageName: fr.unix_experience.owncloud_sms; className: android.widget.TextView; text: Allg. Einstellungen; contentDescription: null; viewIdResName: android:id/title; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: false; longClickable: false; enabled: true; password: false; scrollable: false; [ACTION_SELECT, ACTION_CLEAR_SELECTION, ACTION_ACCESSIBILITY_FOCUS, ACTION_NEXT_AT_MOVEMENT_GRANULARITY, ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY, ACTION_SET_SELECTION]
E/AccessibilityNodeInfoCache( 1693): Node from: 201 not from:190 android.view.accessibility.AccessibilityNodeInfo@17bcf; boundsInParent: Rect(0, 0 - 358, 57); boundsInScreen: Rect(72, 615 - 430, 672); packageName: fr.unix_experience.owncloud_sms; className: android.widget.TextView; text: Sync-Einstellungen; contentDescription: null; viewIdResName: android:id/summary; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: false; longClickable: false; enabled: true; password: false; scrollable: false; [ACTION_SELECT, ACTION_CLEAR_SELECTION, ACTION_ACCESSIBILITY_FOCUS, ACTION_NEXT_AT_MOVEMENT_GRANULARITY, ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY, ACTION_SET_SELECTION]
E/AccessibilityNodeInfoCache( 1693): Node from: 201 not from:190 android.view.accessibility.AccessibilityNodeInfo@1b41e; boundsInParent: Rect(0, 0 - 984, 192); boundsInScreen: Rect(48, 511 - 1032, 703); packageName: fr.unix_experience.owncloud_sms; className: android.widget.LinearLayout; text: null; contentDescription: null; viewIdResName: null; checkable: false; checked: false; focusable: false; focused: false; selected: false; clickable: true; longClickable: false; enabled: true; password: false; scrollable: false; [ACTION_SELECT, ACTION_CLEAR_SELECTION, ACTION_CLICK, ACTION_ACCESSIBILITY_FOCUS]
I/ActivityManager( 755): Start proc fr.unix_experience.owncloud_sms:sync for service fr.unix_experience.owncloud_sms/.sync_adapters.SmsSyncService: pid=4277 uid=10505 gids={50505, 3003}
D/ActivityThread( 4277): handleBindApplication:fr.unix_experience.owncloud_sms:sync
W/StatusBarIconView( 1192): No icon for slot fr.unix_experience.owncloud_sms/0x0
D/NotificationService( 755): onNotification error pkg=fr.unix_experience.owncloud_sms tag=null id=0; will crashApplication(uid=10505, pid=4277)
E/AndroidRuntime( 4277): Process: fr.unix_experience.owncloud_sms:sync, PID: 4277
E/AndroidRuntime( 4277): android.app.RemoteServiceException: Bad notification posted from package fr.unix_experience.owncloud_sms: Couldn't create icon: StatusBarIcon(pkg=fr.unix_experience.owncloud_smsuser=0 id=0x7f020057 level=0 visible=true num=0 )
D/NetworkUtils( 4277): Searching known-servers store at /data/data/fr.unix_experience.owncloud_sms/files/knownServers.bks
I/ActivityManager( 755): Process fr.unix_experience.owncloud_sms:sync (pid 4277) has died.
W/ActivityManager( 755): Scheduling restart of crashed service fr.unix_experience.owncloud_sms/.sync_adapters.SmsSyncService in 1000ms