diff --git a/Errno.cpp b/Errno.cpp
index 6f65c9339..32e81c70f 100644
--- a/Errno.cpp
+++ b/Errno.cpp
@@ -198,6 +198,10 @@ case EMALFORMEDQUERY: return "Malformed query";
 case ESHARDDOWN: return "One or more shards are down";
 case EDOCWARC: return "Doc is WARC or ARC and support is disabled";
 case EDIFFBOTREQUESTTIMEDOUTTHIRDPARTY: return "Diffbot request of third-party content timed out";
+case EDIFFBOTTOOMANYTEXTNODES: return "The selected pages contains too many TextNodes (>50000) for Diffbot";
+case EDIFFBOTCURLYREPLY: return "Diffbot reply was {}";
+case EDIFFBOTTOKENUNAUTHORIZED: return "Diffbot token was unauthorized";
+case EDIFFBOTPLAINERROR: return "Diffbot error code was 500";
 	}
 	// if the remote error bit is clear it must be a regulare errno
 	//if ( ! ( errnum & REMOTE_ERROR_BIT ) ) return strerror ( errnum );
diff --git a/Errno.h b/Errno.h
index 3b79be398..d9f4e3291 100644
--- a/Errno.h
+++ b/Errno.h
@@ -203,6 +203,10 @@ enum {
 	ESHARDDOWN,
 	EDOCWARC,
 	EWRONGSHARD,
-	EDIFFBOTREQUESTTIMEDOUTTHIRDPARTY
+	EDIFFBOTREQUESTTIMEDOUTTHIRDPARTY,
+	EDIFFBOTTOOMANYTEXTNODES,
+	EDIFFBOTCURLYREPLY,
+	EDIFFBOTTOKENUNAUTHORIZED,
+	EDIFFBOTPLAINERROR
 };
 #endif
diff --git a/XmlDoc.cpp b/XmlDoc.cpp
index c87121447..b488896ae 100644
--- a/XmlDoc.cpp
+++ b/XmlDoc.cpp
@@ -15856,6 +15856,10 @@ void gotDiffbotReplyWrapper ( void *state , TcpSocket *s ) {
 			char *err = strstr(page,"\"error\":\"");
 			if ( err ) err += 9;
 			int32_t code = EDIFFBOTUNKNOWNERROR;
+			if ( ! err &&
+			     page[0]=='{' &&
+			     page[1]=='}' )
+				code = EDIFFBOTCURLYREPLY;
 			if ( err && !strncmp(err,"Unable to apply rules",21))
 				code = EDIFFBOTUNABLETOAPPLYRULES;
 			// like .pdf pages get this error
@@ -15871,17 +15875,23 @@ void gotDiffbotReplyWrapper ( void *state , TcpSocket *s ) {
 				code = EDIFFBOTVERSIONREQ;
 			if ( err && !strncmp(err,"Empty content",13))
 				code = EDIFFBOTEMPTYCONTENT;
+			if ( err && !strncmp(err,"The selected pages contains too many TextNodes",46))
+				code = EDIFFBOTTOOMANYTEXTNODES;
 			if ( err && !strncmp(err,"No content received",19))
 				code = EDIFFBOTEMPTYCONTENT;
 			if ( err && !strncmp(err,"Request timed",13))
 				code = EDIFFBOTREQUESTTIMEDOUT;
-			if ( err &&!strncmp(err,"Request of third-party c",13))
+			if ( err &&!strncmp(err,"Request of third-party c",24))
 				code = EDIFFBOTREQUESTTIMEDOUTTHIRDPARTY;
 			// error processing url
 			if ( err && !strncmp(err,"Error processing",16))
 				code = EDIFFBOTURLPROCESSERROR;
 			if ( err && !strncmp(err,"Your token has exp",18))
 				code = EDIFFBOTTOKENEXPIRED;
+			if ( err && !strncmp(err,"Not authorized API tok",22))
+				code = EDIFFBOTTOKENUNAUTHORIZED;
+			if ( err && !strncmp(err,"Error.",6) )
+				code = EDIFFBOTPLAINERROR;
 			THIS->m_diffbotReplyError = code;
 		}
 		// a hack for detecting if token is expired