diff --git a/models/issues/content_history.go b/models/issues/content_history.go
index 8c333bc6dd..8b00adda99 100644
--- a/models/issues/content_history.go
+++ b/models/issues/content_history.go
@@ -161,7 +161,11 @@ func FetchIssueContentHistoryList(dbCtx context.Context, issueID, commentID int6
 	}
 
 	for _, item := range res {
-		item.UserAvatarLink = avatars.GenerateUserAvatarFastLink(item.UserName, 0)
+		if item.UserID > 0 {
+			item.UserAvatarLink = avatars.GenerateUserAvatarFastLink(item.UserName, 0)
+		} else {
+			item.UserAvatarLink = avatars.DefaultAvatarLink()
+		}
 	}
 	return res, nil
 }
diff --git a/modules/repository/hooks.go b/modules/repository/hooks.go
index daab7c3091..95849789ab 100644
--- a/modules/repository/hooks.go
+++ b/modules/repository/hooks.go
@@ -9,7 +9,6 @@ import (
 	"path/filepath"
 	"runtime"
 
-	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
 )
@@ -94,15 +93,14 @@ done
 `, setting.ScriptType, util.ShellEscape(setting.AppPath), util.ShellEscape(setting.CustomConf)),
 	}
 
-	if git.SupportProcReceive {
-		hookNames = append(hookNames, "proc-receive")
-		hookTpls = append(hookTpls,
-			fmt.Sprintf(`#!/usr/bin/env %s
+	// although only new git (>=2.29) supports proc-receive, it's still good to create its hook, in case the user upgrades git
+	hookNames = append(hookNames, "proc-receive")
+	hookTpls = append(hookTpls,
+		fmt.Sprintf(`#!/usr/bin/env %s
 # AUTO GENERATED BY GITEA, DO NOT MODIFY
 %s hook --config=%s proc-receive
 `, setting.ScriptType, util.ShellEscape(setting.AppPath), util.ShellEscape(setting.CustomConf)))
-		giteaHookTpls = append(giteaHookTpls, "")
-	}
+	giteaHookTpls = append(giteaHookTpls, "")
 
 	return hookNames, hookTpls, giteaHookTpls
 }
diff --git a/routers/web/repo/pull.go b/routers/web/repo/pull.go
index 6b00ec12d8..2c8715ddb8 100644
--- a/routers/web/repo/pull.go
+++ b/routers/web/repo/pull.go
@@ -1236,19 +1236,19 @@ func MergePullRequest(ctx *context.Context) {
 				return
 			}
 			ctx.Flash.Error(flashError)
-			ctx.Redirect(issue.Link())
+			ctx.JSONRedirect(issue.Link())
 		} else if models.IsErrMergeUnrelatedHistories(err) {
 			log.Debug("MergeUnrelatedHistories error: %v", err)
 			ctx.Flash.Error(ctx.Tr("repo.pulls.unrelated_histories"))
-			ctx.Redirect(issue.Link())
+			ctx.JSONRedirect(issue.Link())
 		} else if git.IsErrPushOutOfDate(err) {
 			log.Debug("MergePushOutOfDate error: %v", err)
 			ctx.Flash.Error(ctx.Tr("repo.pulls.merge_out_of_date"))
-			ctx.Redirect(issue.Link())
+			ctx.JSONRedirect(issue.Link())
 		} else if models.IsErrSHADoesNotMatch(err) {
 			log.Debug("MergeHeadOutOfDate error: %v", err)
 			ctx.Flash.Error(ctx.Tr("repo.pulls.head_out_of_date"))
-			ctx.Redirect(issue.Link())
+			ctx.JSONRedirect(issue.Link())
 		} else if git.IsErrPushRejected(err) {
 			log.Debug("MergePushRejected error: %v", err)
 			pushrejErr := err.(*git.ErrPushRejected)
diff --git a/services/mailer/mail_release.go b/services/mailer/mail_release.go
index 983e55a436..e17801be2a 100644
--- a/services/mailer/mail_release.go
+++ b/services/mailer/mail_release.go
@@ -74,6 +74,7 @@ func mailNewRelease(ctx context.Context, lang string, tos []string, rel *repo_mo
 		"Release":  rel,
 		"Subject":  subject,
 		"Language": locale.Language(),
+		"Link":     rel.HTMLURL(),
 	}
 
 	var mailBody bytes.Buffer
diff --git a/services/packages/debian/repository.go b/services/packages/debian/repository.go
index b968ac2f81..813fef36f8 100644
--- a/services/packages/debian/repository.go
+++ b/services/packages/debian/repository.go
@@ -341,7 +341,7 @@ func buildReleaseFiles(ctx context.Context, ownerID int64, repoVersion *packages
 	fmt.Fprintf(w, "Components: %s\n", strings.Join(components, " "))
 	fmt.Fprintf(w, "Architectures: %s\n", strings.Join(architectures, " "))
 	fmt.Fprintf(w, "Date: %s\n", time.Now().UTC().Format(time.RFC1123))
-	fmt.Fprint(w, "Acquire-By-Hash: yes")
+	fmt.Fprint(w, "Acquire-By-Hash: yes\n")
 
 	pfds, err := packages_model.GetPackageFileDescriptors(ctx, pfs)
 	if err != nil {
diff --git a/templates/repo/issue/view_content/comments_delete_time.tmpl b/templates/repo/issue/view_content/comments_delete_time.tmpl
index 7c01bb4228..95121b0dc7 100644
--- a/templates/repo/issue/view_content/comments_delete_time.tmpl
+++ b/templates/repo/issue/view_content/comments_delete_time.tmpl
@@ -1,4 +1,4 @@
-{{if .comment.Time}} {{/* compatibility with time comments made before v1.14 */}}
+{{if and .comment.Time (.ctxData.Repository.IsTimetrackerEnabled ctx)}} {{/* compatibility with time comments made before v1.14 */}}
 	{{if (not .comment.Time.Deleted)}}
 		{{if (or .ctxData.IsAdmin (and .ctxData.IsSigned (eq .ctxData.SignedUserID .comment.PosterID)))}}
 			<span class="gt-float-right">