diff --git a/cmd/tailscale/backend.go b/cmd/tailscale/backend.go
index 445a15f..fdd6afd 100644
--- a/cmd/tailscale/backend.go
+++ b/cmd/tailscale/backend.go
@@ -40,6 +40,8 @@ type backend struct {
 	lastCfg    *router.Config
 	lastDNSCfg *dns.OSConfig
 
+	logIDPublic string
+
 	// avoidEmptyDNS controls whether to use fallback nameservers
 	// when no nameservers are provided by Tailscale.
 	avoidEmptyDNS bool
@@ -117,7 +119,8 @@ func newBackend(dataDir string, jvm *jni.JVM, appCtx jni.Object, store *stateSto
 	if err != nil {
 		return nil, fmt.Errorf("runBackend: NewUserspaceEngine: %v", err)
 	}
-	local, err := ipnlocal.NewLocalBackend(logf, logID.Public().String(), store, dialer, engine)
+	b.logIDPublic = logID.Public().String()
+	local, err := ipnlocal.NewLocalBackend(logf, b.logIDPublic, store, dialer, engine)
 	if err != nil {
 		engine.Close()
 		return nil, fmt.Errorf("runBackend: NewLocalBackend: %v", err)
diff --git a/cmd/tailscale/main.go b/cmd/tailscale/main.go
index 59066cd..4ab8520 100644
--- a/cmd/tailscale/main.go
+++ b/cmd/tailscale/main.go
@@ -6,7 +6,9 @@ package main
 
 import (
 	"context"
+	"crypto/rand"
 	"crypto/sha1"
+	"encoding/hex"
 	"errors"
 	"fmt"
 	"io"
@@ -19,6 +21,7 @@ import (
 	"path/filepath"
 	"sort"
 	"strings"
+	"sync/atomic"
 	"time"
 	"unsafe"
 
@@ -47,7 +50,8 @@ type App struct {
 	// appCtx is a global reference to the com.tailscale.ipn.App instance.
 	appCtx jni.Object
 
-	store *stateStore
+	store             *stateStore
+	logIDPublicAtomic atomic.Value // of string
 
 	// netStates receives the most recent network state.
 	netStates chan BackendState
@@ -180,6 +184,7 @@ type FileSendEvent struct {
 type (
 	ToggleEvent     struct{}
 	ReauthEvent     struct{}
+	BugEvent        struct{}
 	WebAuthEvent    struct{}
 	GoogleAuthEvent struct{}
 	LogoutEvent     struct{}
@@ -266,6 +271,7 @@ func (a *App) runBackend() error {
 	if err != nil {
 		return err
 	}
+	a.logIDPublicAtomic.Store(b.logIDPublic)
 	defer b.CloseTUNs()
 
 	// Contrary to the documentation for VpnService.Builder.addDnsServer,
@@ -1059,6 +1065,11 @@ func (a *App) processUIEvents(w *app.Window, events []UIEvent, act jni.Object, s
 			default:
 				requestBackend(WebAuthEvent{})
 			}
+		case BugEvent:
+			backendLogID, _ := a.logIDPublicAtomic.Load().(string)
+			logMarker := fmt.Sprintf("BUG-%v-%v-%v", backendLogID, time.Now().UTC().Format("20060102150405Z"), randHex(8))
+			log.Printf("user bugreport: %s", logMarker)
+			w.WriteClipboard(logMarker)
 		case WebAuthEvent:
 			a.store.WriteString(loginMethodPrefKey, loginMethodWeb)
 			requestBackend(e)
@@ -1341,3 +1352,9 @@ func fatalErr(err error) {
 	// TODO: expose in UI.
 	log.Printf("fatal error: %v", err)
 }
+
+func randHex(n int) string {
+	b := make([]byte, n)
+	rand.Read(b)
+	return hex.EncodeToString(b)
+}
diff --git a/cmd/tailscale/ui.go b/cmd/tailscale/ui.go
index d360bfe..d32a1f8 100644
--- a/cmd/tailscale/ui.go
+++ b/cmd/tailscale/ui.go
@@ -83,6 +83,7 @@ type UI struct {
 
 		copy   widget.Clickable
 		reauth widget.Clickable
+		bug    widget.Clickable
 		exits  widget.Clickable
 		logout widget.Clickable
 	}
@@ -313,6 +314,11 @@ func (ui *UI) layout(gtx layout.Context, sysIns system.Insets, state *clientStat
 		events = append(events, ReauthEvent{})
 	}
 
+	if ui.menuClicked(&ui.menu.bug) {
+		events = append(events, BugEvent{})
+		ui.showCopied(gtx, "bug report marker to clipboard")
+	}
+
 	if ui.menuClicked(&ui.menu.exits) || ui.openExitDialog.Clicked() {
 		ui.exitDialog.show = true
 	}
@@ -965,12 +971,13 @@ func (ui *UI) layoutMenu(gtx layout.Context, sysIns system.Insets, expiry time.T
 		return layout.NE.Layout(gtx, func(gtx C) D {
 			menu := &ui.menu
 			items := []menuItem{
-				{title: "Copy My IP Address", btn: &menu.copy},
+				{title: "Copy my IP address", btn: &menu.copy},
 			}
 			if showExits {
 				items = append(items, menuItem{title: "Use exit node...", btn: &menu.exits})
 			}
 			items = append(items,
+				menuItem{title: "Bug report", btn: &menu.bug},
 				menuItem{title: "Reauthenticate", btn: &menu.reauth},
 				menuItem{title: "Log out", btn: &menu.logout},
 			)