diff --git a/docker/frontend/src/Library.tsx b/docker/frontend/src/Library.tsx
index d6da93e..81ea633 100644
--- a/docker/frontend/src/Library.tsx
+++ b/docker/frontend/src/Library.tsx
@@ -1018,9 +1018,15 @@ function Catalogue() {
   // roll's top level usually holds no file of its own.
   const shown = useMemo(() => {
     if (!rootName) return photos;
-    const dir = node === rootName ? '' : (node ?? '').slice(rootName.length + 1);
-    const below = dir === '' ? (p: LibraryPhoto) => p.dir !== '' : (p: LibraryPhoto) => p.dir.startsWith(`${dir}/`);
-    return photos.filter((p) => p.folder === rootName && (p.dir === dir || (deep && below(p))));
+    const normRoot = rootName.replace(/\\/g, '/');
+    const normNode = (node ?? '').replace(/\\/g, '/');
+    const dir = normNode === normRoot ? '' : normNode.slice(normRoot.length + 1);
+    const below = dir === '' ? (p: LibraryPhoto) => (p.dir ?? '').replace(/\\/g, '/') !== '' : (p: LibraryPhoto) => (p.dir ?? '').replace(/\\/g, '/').startsWith(`${dir}/`);
+    return photos.filter((p) => {
+      const pFolder = (p.folder ?? '').replace(/\\/g, '/');
+      const pDir = (p.dir ?? '').replace(/\\/g, '/');
+      return pFolder === normRoot && (pDir === dir || (deep && below(p)));
+    });
   }, [deep, node, photos, rootName]);
 
   // What the thumbnail view draws, out of what the open node holds. A frame's
@@ -2311,7 +2317,7 @@ function Catalogue() {
                 return next;
               });
               setTimeout(() => {
-                const el = document.querySelector(`[data-key="lib-folder-${targetNode}"]`) || document.querySelector(`[data-key="lib-folder-${photo.folder}"]`);
+                const el = document.querySelector(`[data-key="lib-node-${targetNode}"]`) || document.querySelector(`[data-key="lib-node-${photo.folder}"]`);
                 if (el) {
                   el.scrollIntoView({ behavior: 'smooth', block: 'center' });
                   el.classList.add('lib-folder-highlight');
diff --git a/docker/frontend/src/engine/library.ts b/docker/frontend/src/engine/library.ts
index 4f9e37d..4b4153e 100644
--- a/docker/frontend/src/engine/library.ts
+++ b/docker/frontend/src/engine/library.ts
@@ -135,8 +135,12 @@ export function isSupportedPhoto(name: string): boolean {
   return isRawName(name) || SUPPORTED.test(name);
 }
 
+export function normPath(p: string): string {
+  return (p || '').replace(/\\/g, '/').replace(/\/+/g, '/').replace(/\/$/, '');
+}
+
 export function photoId(folder: string, name: string): string {
-  return `${folder}/${name}`;
+  return `${normPath(folder)}/${normPath(name)}`;
 }
 
 // The picker is Chromium-only (Chrome, Edge, Opera, Brave): Firefox and Safari
@@ -949,11 +953,12 @@ export async function scanFolder(
     const size = preview ? jpegSize(preview) : (raw || heic || isTiff) ? null : jpegSize(bytes);
     const thumb = src ? await tile(src, size) : null;
     const taken = (await readCapturedAt(bytes)) ?? file.lastModified;
-    const cut = rel.lastIndexOf('/');
+    const relNorm = rel.replace(/\\/g, '/');
+    const cut = relNorm.lastIndexOf('/');
     const row: LibraryPhoto = {
       id,
-      folder: folder.name,
-      dir: cut < 0 ? '' : rel.slice(0, cut),
+      folder: normPath(folder.name),
+      dir: cut < 0 ? '' : normPath(relNorm.slice(0, cut)),
       name: handle.name,
       handle,
       thumb,