diff --git a/models/cloudbrain.go b/models/cloudbrain.go
index c26f8a2b6..4b2bec8e6 100755
--- a/models/cloudbrain.go
+++ b/models/cloudbrain.go
@@ -687,7 +687,7 @@ func CanDelJob(isSigned bool, user *User, job *CloudbrainInfo) bool {
 		return false
 	}
 
-	if user.ID == job.UserID || user.IsAdmin || permission.AccessMode >= AccessModeAdmin {
+	if (user.ID == job.UserID && permission.AccessMode >= AccessModeWrite) || user.IsAdmin || permission.AccessMode >= AccessModeAdmin {
 		return true
 	}
 	return false
diff --git a/models/repo_list.go b/models/repo_list.go
index 928e1f953..c4d8ee823 100755
--- a/models/repo_list.go
+++ b/models/repo_list.go
@@ -331,7 +331,7 @@ func SearchRepositoryCondition(opts *SearchRepoOptions) builder.Cond {
 	}
 	if opts.TopicName != "" {
 		var subQueryCond = builder.NewCond()
-		subQueryCond = subQueryCond.Or(builder.Eq{"topic.name": opts.TopicName})
+		subQueryCond = subQueryCond.Or(builder.Eq{"topic.name": strings.ToLower(opts.TopicName)})
 		subQuery := builder.Select("repo_topic.repo_id").From("repo_topic").
 			Join("INNER", "topic", "topic.id = repo_topic.topic_id").
 			Where(subQueryCond).
diff --git a/templates/repo/cloudbrain/index.tmpl b/templates/repo/cloudbrain/index.tmpl
index 0626f57c6..3af96998c 100755
--- a/templates/repo/cloudbrain/index.tmpl
+++ b/templates/repo/cloudbrain/index.tmpl
@@ -318,7 +318,11 @@
                                 </div>
 
                                 <div class="one wide column">
-                                    <a href="{{AppSubUrl}}/{{.User.Name}}" title="{{.User.Name}}"><img class="ui avatar image" src="{{.User.RelAvatarLink}}"></a>
+                                    {{if .User.Name}}
+                                        <a href="{{AppSubUrl}}/{{.User.Name}}" title="{{.User.Name}}"><img class="ui avatar image" src="{{.User.RelAvatarLink}}"></a>
+                                    {{else}}
+                                        <a title="Ghost"><img class="ui avatar image" src="{{AppSubUrl}}/user/avatar/Ghost/-1"></a>
+                                    {{end}}
                                 </div>
                                 <div class="seven wide column text right">
                                     <div class="ui compact buttons">  
diff --git a/templates/repo/modelarts/index.tmpl b/templates/repo/modelarts/index.tmpl
index f09b7a36e..7820cb109 100755
--- a/templates/repo/modelarts/index.tmpl
+++ b/templates/repo/modelarts/index.tmpl
@@ -292,7 +292,11 @@
                                 </div>
 
                                 <div class="one wide column">
+                                    {{if .User.Name}}
                                         <a href="{{AppSubUrl}}/{{.User.Name}}" title="{{.User.Name}}"><img class="ui avatar image" src="{{.User.RelAvatarLink}}"></a>
+                                    {{else}}
+                                        <a title="Ghost"><img class="ui avatar image" src="{{AppSubUrl}}/user/avatar/Ghost/-1"></a>
+                                    {{end}}
                                 </div>
 
                                 <div class="seven wide column text right">