diff --git a/packages/frontend/package.json b/packages/frontend/package.json
index 771f47a..5a30a55 100644
--- a/packages/frontend/package.json
+++ b/packages/frontend/package.json
@@ -25,6 +25,7 @@
 		"clsx": "catalog:",
 		"common": "workspace:^",
 		"effect": "catalog:",
+		"jszip": "catalog:",
 		"lucide-react": "catalog:",
 		"opensheetmusicdisplay": "catalog:",
 		"react": "catalog:",
diff --git a/packages/frontend/src/app.tsx b/packages/frontend/src/app.tsx
index 551477a..cab2589 100644
--- a/packages/frontend/src/app.tsx
+++ b/packages/frontend/src/app.tsx
@@ -67,13 +67,21 @@ const router = createBrowserRouter([
 		path: "/login",
 		Component: Login,
 	},
-]);
+], {
+	future: {
+		v7_fetcherPersist: true,
+		v7_normalizeFormMethod: true,
+		v7_partialHydration: true,
+		v7_relativeSplatPath: true,
+		v7_skipActionErrorRevalidation: true,
+	},
+});
 
 const rootElement = document.getElementById("root") as HTMLDivElement;
 const root = createRoot(rootElement);
 
 root.render(
 	<StrictMode>
-		<RouterProvider router={router} />
+		<RouterProvider router={router} future={{ v7_startTransition: true }} />
 	</StrictMode>,
 );
diff --git a/packages/frontend/src/routes/Attachment.tsx b/packages/frontend/src/routes/Attachment.tsx
index 92e9808..2557636 100644
--- a/packages/frontend/src/routes/Attachment.tsx
+++ b/packages/frontend/src/routes/Attachment.tsx
@@ -1,8 +1,9 @@
 import { client } from "@/client";
 import { useLoading } from "@/hooks/useLoading.ts";
 import { AttachmentId, PieceId } from "common";
+import JSZip from "jszip";
 import { OpenSheetMusicDisplay } from "opensheetmusicdisplay";
-import { useEffect, useRef } from "react";
+import { useCallback, useEffect, useRef } from "react";
 import { useParams } from "react-router-dom";
 
 export default function Attachment() {
@@ -14,33 +15,81 @@ export default function Attachment() {
 	const { isLoading, error, data } = useLoading(() => client.piece({ pieceId }).attachment({ attachmentId }).get(), [pieceId, attachmentId]);
 
 	const containerRef = useRef<HTMLDivElement>(null);
+	const renderFn = useRef<null | (() => void)>(null);
+
+	const load = useCallback(async () => {
 
-	useEffect(() => {
 		if (isLoading || error !== null) return;
 
-		const url = URL.createObjectURL(data);
+		let musixXmlBlob: Blob = data;
 
-		const render = () => osmd.render();
+		/* If the file is the compressed .mxl file, we do the uncompression
+		 * ourselves, because apparently OpenSheetMusicDisplay is incapable.
+		 */
+		if (data.type === "application/vnd.recordare.musicxml") {
+			const zip = new JSZip();
+			await zip.loadAsync(data);
+
+			const containerFile = zip.file("META-INF/container.xml");
+			if (containerFile === null) {
+				console.error("Missing META-INF/container.xml in the .mxl file");
+				return;
+			}
+
+			const containerText = await containerFile.async("text");
+			const containerXml = new DOMParser().parseFromString(containerText, "application/xml");
+
+			const rootFile = containerXml.querySelector("rootfile[media-type=\"application/vnd.recordare.musicxml+xml\"], rootfile:not([media-type])");
+			if (rootFile === null) {
+				console.error("Missing root MusicXML file in META-INF/container.xml");
+				return;
+			}
+
+			const fullPath = rootFile.getAttribute("full-path");
+			if (fullPath === null) {
+				console.error("Missing full-path attribute in rootfile element");
+				return;
+			}
+
+			const musicXmlFile = zip.file(fullPath);
+			if (musicXmlFile === null) {
+				console.error(`Missing ${fullPath} file in the .mxl archive`);
+				return;
+			}
+
+			musixXmlBlob = await musicXmlFile.async("blob");
+		}
+
+		const musicXml = await musixXmlBlob.text();
 
 		const osmd = new OpenSheetMusicDisplay(containerRef.current!, {
 			autoResize: false,
 			drawTitle: false,
 			drawComposer: false,
 			drawMeasureNumbers: true,
-			drawMeasureNumbersOnlyAtSystemStart: true,
-			//measureNumberInterval: 5,
-			//renderSingleHorizontalStaffline: true,
+			drawMeasureNumbersOnlyAtSystemStart: false,
+			measureNumberInterval: 1,
+			renderSingleHorizontalStaffline: true,
 		});
 
-		osmd.load(url).then(render, (error) => console.error(error));
+		const render = () => osmd.render();
+
+		await osmd.load(musicXml);
+		render();
+
+		renderFn.current = render;
+	}, [data, error, isLoading]);
+
+	useEffect(() => void load(), [load]);
+
+	useEffect(() => {
+		const render = () => renderFn.current?.();
 
 		window.addEventListener("resize", render);
-
 		return () => {
-			URL.revokeObjectURL(url);
 			window.removeEventListener("resize", render);
 		};
-	}, [data, error, isLoading]);
+	}, []);
 
 	if (isLoading) {
 		return (
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 76fe5cc..bee8091 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -66,6 +66,9 @@ catalogs:
     eslint-plugin-react-hooks:
       specifier: ^5.1.0
       version: 5.1.0
+    jszip:
+      specifier: ^3.10.1
+      version: 3.10.1
     kysely:
       specifier: ^0.27.4
       version: 0.27.4
@@ -192,6 +195,9 @@ importers:
       effect:
         specifier: 'catalog:'
         version: 3.11.4
+      jszip:
+        specifier: 'catalog:'
+        version: 3.10.1
       lucide-react:
         specifier: 'catalog:'
         version: 0.462.0(react@18.3.1)
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 0808841..251b700 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -22,6 +22,7 @@ catalog:
   effect: '^3.11.4'
   elysia: '^1.1.25'
   eslint-plugin-react-hooks: '^5.1.0'
+  jszip: '^3.10.1'
   kysely: '^0.27.4'
   kysely-bun-sqlite: '^0.3.2'
   lucide-react: '^0.462.0'