[Nexus 6 Android Development] nathanchance:
Agreed, probably couldn't have said it better myself. He takes care of everything. Not to mention on top of bring up an entire branch with tons of new code, he added in some new features and fixed some broken stuff. Pretty nuts.

You may want to take a look at that log on the last page. Offending part looks to be this, not sure how to interpret it:

01-28 20:33:38.007 E/AndroidRuntime(13484): FATAL EXCEPTION: main
01-28 20:33:38.007 E/AndroidRuntime(13484): Process: org.cyanogenmod.themes.provider, PID: 13484
01-28 20:33:38.007 E/AndroidRuntime(13484): android.database.sqlite.SQLiteException: Can't downgrade database from version 19 to 17
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.database.sqlite.SQLiteOpenHelper.onDowngrade(SQLiteOpenHelper.java:360)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:254)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at org.cyanogenmod.themes.provider.ThemesProvider$VerifyInstalledThemesThread.<init>(ThemesProvider.java:484)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at org.cyanogenmod.themes.provider.ThemesProvider$1.run(ThemesProvider.java:233)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.os.Handler.handleCallback(Handler.java:739)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.os.Handler.dispatchMessage(Handler.java:95)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.os.Looper.loop(Looper.java:148)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at android.app.ActivityThread.main(ActivityThread.java:5449)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at java.lang.reflect.Method.invoke(Native Method)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
01-28 20:33:38.007 E/AndroidRuntime(13484):	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
01-28 20:33:38.019 E/DatabaseUtils(13484): Writing exception to parcel
01-28 20:33:38.019 E/DatabaseUtils(13484): android.database.sqlite.SQLiteException: Can't downgrade database from version 19 to 17
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.database.sqlite.SQLiteOpenHelper.onDowngrade(SQLiteOpenHelper.java:360)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:254)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:187)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at org.cyanogenmod.themes.provider.ThemesProvider.query(ThemesProvider.java:245)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.content.ContentProvider.query(ContentProvider.java:1017)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.content.ContentProvider$Transport.query(ContentProvider.java:238)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:112)
01-28 20:33:38.019 E/DatabaseUtils(13484):	at android.os.Binder.execTransact(Binder.java:453)
01-28 20:33:38.031 E/AndroidRuntime(13469): FATAL EXCEPTION: ModernAsyncTask #1
01-28 20:33:38.031 E/AndroidRuntime(13469): Process: org.cyanogenmod.theme.chooser, PID: 13469
01-28 20:33:38.031 E/AndroidRuntime(13469): java.lang.RuntimeException: An error occurred while executing doInBackground()
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.ModernAsyncTask$3.done(ModernAsyncTask.java:142)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:354)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.util.concurrent.FutureTask.setException(FutureTask.java:223)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.util.concurrent.FutureTask.run(FutureTask.java:242)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.lang.Thread.run(Thread.java:818)
01-28 20:33:38.031 E/AndroidRuntime(13469): Caused by: android.database.sqlite.SQLiteException: Can't downgrade database from version 19 to 17
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:179)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:135)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.content.ContentProviderProxy.query(ContentProviderNative.java:421)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.content.ContentResolver.query(ContentResolver.java:491)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.ContentResolverCompatJellybean.query(ContentResolverCompatJellybean.java:29)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.ContentResolverCompat$ContentResolverCompatImplJB.query(ContentResolverCompat.java:57)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.ContentResolverCompat.query(ContentResolverCompat.java:125)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.CursorLoader.loadInBackground(CursorLoader.java:59)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.CursorLoader.loadInBackground(CursorLoader.java:51)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.AsyncTaskLoader.onLoadInBackground(AsyncTaskLoader.java:296)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:54)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.AsyncTaskLoader$LoadTask.doInBackground(AsyncTaskLoader.java:51)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at android.support.v4.content.ModernAsyncTask$2.call(ModernAsyncTask.java:128)
01-28 20:33:38.031 E/AndroidRuntime(13469):	at java.util.concurrent.FutureTask.run(FutureTask.java:237)
01-28 20:33:38.031 E/AndroidRuntime(13469):	... 3 more