diff --git a/README.md b/README.md
index dd8c088cb5..c8226d8d9f 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ Gogs - Go Git Service [![Build Status](https://travis-ci.org/gogits/gogs.svg?bra
 
 ![](https://github.com/gogits/gogs/blob/master/public/img/gogs-large-resize.png?raw=true)
 
-##### Current version: 0.8.30
+##### Current version: 0.8.31
 
 | Web | UI  | Preview  |
 |:-------------:|:-------:|:-------:|
diff --git a/gogs.go b/gogs.go
index 7695d0478d..0da7485e04 100644
--- a/gogs.go
+++ b/gogs.go
@@ -17,7 +17,7 @@ import (
 	"github.com/gogits/gogs/modules/setting"
 )
 
-const APP_VER = "0.8.30.0204"
+const APP_VER = "0.8.31.0205"
 
 func init() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
diff --git a/models/admin.go b/models/admin.go
index 1d6bf62961..811edde244 100644
--- a/models/admin.go
+++ b/models/admin.go
@@ -5,12 +5,15 @@
 package models
 
 import (
+	"fmt"
+	"os"
 	"strings"
 	"time"
 
 	"github.com/Unknwon/com"
 
 	"github.com/gogits/gogs/modules/base"
+	"github.com/gogits/gogs/modules/log"
 )
 
 type NoticeType int
@@ -47,6 +50,18 @@ func CreateRepositoryNotice(desc string) error {
 	return CreateNotice(NOTICE_REPOSITORY, desc)
 }
 
+// RemoveAllWithNotice removes all directories in given path and
+// creates a system notice when error occurs.
+func RemoveAllWithNotice(title, path string) {
+	if err := os.RemoveAll(path); err != nil {
+		desc := fmt.Sprintf("%s [%s]: %v", title, path, err)
+		log.Warn(desc)
+		if err = CreateRepositoryNotice(desc); err != nil {
+			log.Error(4, "CreateRepositoryNotice: %v", err)
+		}
+	}
+}
+
 // CountNotices returns number of notices.
 func CountNotices() int64 {
 	count, _ := x.Count(new(Notice))
diff --git a/models/repo.go b/models/repo.go
index 868498bc8d..f838de7eaa 100644
--- a/models/repo.go
+++ b/models/repo.go
@@ -1123,16 +1123,22 @@ func ChangeRepositoryName(u *User, oldRepoName, newRepoName string) (err error)
 		return ErrRepoAlreadyExist{u.Name, newRepoName}
 	}
 
+	repo, err := GetRepositoryByName(u.Id, oldRepoName)
+	if err != nil {
+		return fmt.Errorf("GetRepositoryByName: %v", err)
+	}
+
 	// Change repository directory name.
-	if err = os.Rename(RepoPath(u.Name, oldRepoName), RepoPath(u.Name, newRepoName)); err != nil {
+	if err = os.Rename(repo.RepoPath(), RepoPath(u.Name, newRepoName)); err != nil {
 		return fmt.Errorf("rename repository directory: %v", err)
 	}
 
-	wikiPath := WikiPath(u.Name, oldRepoName)
+	wikiPath := repo.WikiPath()
 	if com.IsExist(wikiPath) {
 		if err = os.Rename(wikiPath, WikiPath(u.Name, newRepoName)); err != nil {
 			return fmt.Errorf("rename repository wiki: %v", err)
 		}
+		RemoveAllWithNotice("Delete repository wiki local copy", repo.LocalWikiPath())
 	}
 
 	return nil
@@ -1295,30 +1301,16 @@ func DeleteRepository(uid, repoID int64) error {
 
 	// Remove repository files.
 	repoPath := repo.repoPath(sess)
-	if err = os.RemoveAll(repoPath); err != nil {
-		desc := fmt.Sprintf("delete repository files [%s]: %v", repoPath, err)
-		log.Warn(desc)
-		if err = CreateRepositoryNotice(desc); err != nil {
-			log.Error(4, "CreateRepositoryNotice: %v", err)
-		}
-	}
+	RemoveAllWithNotice("Delete repository files", repoPath)
 
 	wikiPaths := []string{repo.WikiPath(), repo.LocalWikiPath()}
 	for _, wikiPath := range wikiPaths {
-		if err = os.RemoveAll(wikiPath); err != nil {
-			desc := fmt.Sprintf("delete repository wiki [%s]: %v", wikiPath, err)
-			log.Warn(desc)
-			if err = CreateRepositoryNotice(desc); err != nil {
-				log.Error(4, "CreateRepositoryNotice: %v", err)
-			}
-		}
+		RemoveAllWithNotice("Delete repository wiki", wikiPath)
 	}
 
 	// Remove attachment files.
 	for i := range attachmentPaths {
-		if err = os.Remove(attachmentPaths[i]); err != nil {
-			log.Warn("delete attachment: %v", err)
-		}
+		RemoveAllWithNotice("Delete attachment", attachmentPaths[i])
 	}
 
 	if err = sess.Commit(); err != nil {
@@ -1333,7 +1325,7 @@ func DeleteRepository(uid, repoID int64) error {
 			}
 			for i := range forkRepos {
 				if err = DeleteRepository(forkRepos[i].OwnerID, forkRepos[i].ID); err != nil {
-					log.Error(4, "updateRepository[%d]: %v", forkRepos[i].ID, err)
+					log.Error(4, "DeleteRepository [%d]: %v", forkRepos[i].ID, err)
 				}
 			}
 		} else {
diff --git a/models/user.go b/models/user.go
index 23ed5ae8d2..09ad74d76d 100644
--- a/models/user.go
+++ b/models/user.go
@@ -598,11 +598,19 @@ func ChangeUserName(u *User, newUserName string) (err error) {
 		return ErrUserAlreadyExist{newUserName}
 	}
 
-	err = ChangeUsernameInPullRequests(u.Name, newUserName)
-	if err != nil {
+	if err = ChangeUsernameInPullRequests(u.Name, newUserName); err != nil {
 		return fmt.Errorf("ChangeUsernameInPullRequests: %v", err)
 	}
 
+	// Delete all local copies of repository wiki that user owns.
+	if err = x.Where("owner_id=?", u.Id).Iterate(new(Repository), func(idx int, bean interface{}) error {
+		repo := bean.(*Repository)
+		RemoveAllWithNotice("Delete repository wiki local copy", repo.LocalWikiPath())
+		return nil
+	}); err != nil {
+		return fmt.Errorf("Delete repository wiki local copy: %v", err)
+	}
+
 	return os.Rename(UserPath(u.Name), UserPath(newUserName))
 }
 
diff --git a/templates/.VERSION b/templates/.VERSION
index 44eb8eeeaf..9ac7ae77d1 100644
--- a/templates/.VERSION
+++ b/templates/.VERSION
@@ -1 +1 @@
-0.8.30.0204
\ No newline at end of file
+0.8.31.0205
\ No newline at end of file