--- a/extensions.st	Mon Jun 25 14:58:26 2018 +0200
+++ b/extensions.st	Mon Jun 25 18:12:04 2018 +0200
@@ -2354,9 +2354,10 @@
     self isExternalBytes ifFalse:[
         self isString ifFalse:[
             self notEmpty ifTrue:[
-                ((self conform:#isNumber) 
+                ((self noneSatisfy:#isProtoObject) 
+                and:[(self conform:#isNumber)
                 or:[(self conform:#isTimeDuration)
-                or:[(self conform:#isTimestamp)]]) ifTrue:[
+                or:[(self conform:#isTimestamp)]]]) ifTrue:[
                     tabs := tabs copyWith:#inspector2TabGraph
                 ]
             ]
@@ -2369,6 +2370,7 @@
     "
 
     "Modified (comment): / 31-05-2018 / 11:26:33 / Claus Gittinger"
+    "Modified: / 25-06-2018 / 18:07:29 / Maren"
 ! !
 
 !SequenceableCollection methodsFor:'inspecting'!