diff --git a/src/ckdb.c b/src/ckdb.c
index 63d5132f..39cf29e0 100644
--- a/src/ckdb.c
+++ b/src/ckdb.c
@@ -47,7 +47,7 @@
 
 #define DB_VLOCK "1"
 #define DB_VERSION "0.7"
-#define CKDB_VERSION DB_VERSION"-0.50"
+#define CKDB_VERSION DB_VERSION"-0.51"
 
 #define WHERE_FFL " - from %s %s() line %d"
 #define WHERE_FFL_HERE __FILE__, __func__, __LINE__
@@ -9138,6 +9138,11 @@ static void compare_summaries(K_TREE *leftsum, char *leftname,
 	SHARESUMMARY sharesummary;
 	uint64_t total, ok, missing, diff;
 	uint64_t first_used = 0, last_used = 0;
+	int64_t miss_first = 0, miss_last = 0;
+	tv_t miss_first_cd = {0,0}, miss_last_cd = {0,0};
+	int64_t diff_first = 0, diff_last = 0;
+	tv_t diff_first_cd = {0,0}, diff_last_cd = {0,0};
+	char cd_buf1[DATE_BUFSIZ], cd_buf2[DATE_BUFSIZ];
 
 	sharesummary.workinfoid = confirm_first_workinfoid;
 	sharesummary.userid = -1;
@@ -9159,6 +9164,12 @@ static void compare_summaries(K_TREE *leftsum, char *leftname,
 		rss = find_in_ktree(rightsum, lss, cmp_sharesummary_workinfoid, ctxr);
 		if (!rss) {
 			missing++;
+			if (miss_first == 0) {
+				miss_first = DATA_SHARESUMMARY(lss)->workinfoid;
+				copy_tv(&miss_first_cd, &(DATA_SHARESUMMARY(lss)->createdate));
+			}
+			miss_last = DATA_SHARESUMMARY(lss)->workinfoid;
+			copy_tv(&miss_last_cd, &(DATA_SHARESUMMARY(lss)->createdate));
 			if (show_missing) {
 				LOGERR("ERROR: %s %"PRId64"/%s/%ld,%ld %.19s missing from %s",
 					leftname,
@@ -9171,6 +9182,12 @@ static void compare_summaries(K_TREE *leftsum, char *leftname,
 			}
 		} else if (DATA_SHARESUMMARY(rss)->diffacc != DATA_SHARESUMMARY(lss)->diffacc) {
 			diff++;
+			if (diff_first == 0) {
+				diff_first = DATA_SHARESUMMARY(lss)->workinfoid;
+				copy_tv(&diff_first_cd, &(DATA_SHARESUMMARY(lss)->createdate));
+			}
+			diff_last = DATA_SHARESUMMARY(lss)->workinfoid;
+			copy_tv(&diff_last_cd, &(DATA_SHARESUMMARY(lss)->createdate));
 			if (show_diff) {
 				LOGERR("ERROR: %"PRId64"/%s/%ld,%ld %.19s - diffacc: %s: %.0f %s: %.0f",
 					DATA_SHARESUMMARY(lss)->workinfoid,
@@ -9193,6 +9210,20 @@ static void compare_summaries(K_TREE *leftsum, char *leftname,
 		" missing: %"PRIu64" different: %"PRIu64,
 		leftname, rightname, total, first_used, last_used,
 		missing, diff);
+	if (miss_first) {
+		tv_to_buf(&miss_first_cd, cd_buf1, sizeof(cd_buf1));
+		tv_to_buf(&miss_last_cd, cd_buf2, sizeof(cd_buf2));
+		LOGERR(" workinfoid range for missing: %"PRId64"-%"PRId64
+			" (%s .. %s)",
+			miss_first, miss_last, cd_buf1, cd_buf2);
+	}
+	if (diff_first) {
+		tv_to_buf(&diff_first_cd, cd_buf1, sizeof(cd_buf1));
+		tv_to_buf(&diff_last_cd, cd_buf2, sizeof(cd_buf2));
+		LOGERR(" workinfoid range for differences: %"PRId64"-%"PRId64
+			" (%s .. %s)",
+			diff_first, diff_last, cd_buf1, cd_buf2);
+	}
 }
 
 static void confirm_reload()