diff --git a/routers/install.go b/routers/install.go
index b9e8bb290..5d6c65ef9 100644
--- a/routers/install.go
+++ b/routers/install.go
@@ -7,6 +7,7 @@ package routers
 import (
 	"errors"
 	"os"
+	"os/exec"
 	"strings"
 
 	"github.com/Unknwon/goconfig"
@@ -103,6 +104,11 @@ func Install(ctx *middleware.Context, form auth.InstallForm) {
 		return
 	}
 
+	if _, err := exec.LookPath("git"); err != nil {
+		ctx.RenderWithErr("Fail to test 'git' command: "+err.Error(), "install", &form)
+		return
+	}
+
 	// Pass basic check, now test configuration.
 	// Test database setting.
 	dbTypes := map[string]string{"mysql": "mysql", "pgsql": "postgres", "sqlite": "sqlite3"}
diff --git a/routers/user/social.go b/routers/user/social.go
index 7b4d23298..a35da5493 100644
--- a/routers/user/social.go
+++ b/routers/user/social.go
@@ -110,7 +110,7 @@ func SocialSignIn(ctx *middleware.Context, tokens oauth2.Tokens) {
 	case models.ErrOauth2NotAssociatedWithUser:
 		// pass
 	default:
-		log.Error(err) // FIXME: handle error page
+		log.Error(err.Error()) // FIXME: handle error page
 		return
 	}
 	ctx.Session.Set("socialId", oa.Id)
diff --git a/templates/install.tmpl b/templates/install.tmpl
index 1fbc74bc7..c70cfa3e6 100644
--- a/templates/install.tmpl
+++ b/templates/install.tmpl
@@ -156,11 +156,11 @@
                             <label class="col-md-3 control-label">SMTP Host: </label>
 
                             <div class="col-md-8">
-                                <input name="smtp_host" type="text" class="form-control" placeholder="Type SMTP host address" value="{{.smtp_host}}">
+                                <input name="smtp_host" type="text" class="form-control" placeholder="Type SMTP host address and port" value="{{.smtp_host}}">
                             </div>
                         </div>
                         <div class="form-group">
-                            <label class="col-md-3 control-label">Email: </label>
+                            <label class="col-md-3 control-label">Username: </label>
 
                             <div class="col-md-8">
                                 <input name="mailer_user" type="text" class="form-control" placeholder="Type SMTP user e-mail address" value="{{.mailer_user}}">