diff --git a/chrome/content/zotero/xpcom/storage/webdav.js b/chrome/content/zotero/xpcom/storage/webdav.js
index c22ffd77a..5af54a2aa 100644
--- a/chrome/content/zotero/xpcom/storage/webdav.js
+++ b/chrome/content/zotero/xpcom/storage/webdav.js
@@ -1013,46 +1013,40 @@ Zotero.Sync.Storage.Mode.WebDAV.prototype = {
 			
 			// Absolute
 			if (href.match(/^https?:\/\//)) {
-				var ios = Components.classes["@mozilla.org/network/io-service;1"].
-							getService(Components.interfaces.nsIIOService);
-				var href = ios.newURI(href, null, null);
-				href = href.path;
+				let ios = Components.classes["@mozilla.org/network/io-service;1"]
+					.getService(Components.interfaces.nsIIOService);
+				href = ios.newURI(href, null, null).path;
 			}
 			
+			let decodedHref = decodeURIComponent(href).normalize();
+			let decodedPath = decodeURIComponent(path).normalize();
+			
 			// Skip root URI
-			if (href == path
+			if (decodedHref == decodedPath
 					// Some Apache servers respond with a "/zotero" href
 					// even for a "/zotero/" request
-					|| (trailingSlash && href + '/' == path)
-					// Try URL-encoded as well, as above
-					|| decodeURIComponent(href) == path) {
+					|| (trailingSlash && decodedHref + '/' == decodedPath)) {
 				continue;
 			}
 			
-			if (href.indexOf(path) == -1
-					// Try URL-encoded as well, in case there's a '~' or similar
-					// character in the URL and the server (e.g., Sakai) is
-					// encoding the value
-					&& decodeURIComponent(href).indexOf(path) == -1) {
+			if (!decodedHref.startsWith(decodedPath)) {
 				throw new Error(`DAV:href '${href}' does not begin with path '${path}'`);
 			}
 			
 			var matches = href.match(/[^\/]+$/);
 			if (!matches) {
-				throw new Error(
-					"Unexpected href '" + href + "' in " + funcName
-				);
+				throw new Error(`Unexpected href '${href}'`);
 			}
 			var file = matches[0];
 			
-			if (file.indexOf('.') == 0) {
+			if (file.startsWith('.')) {
 				Zotero.debug("Skipping hidden file " + file);
 				continue;
 			}
 			
 			var isLastSyncFile = file == 'lastsync.txt' || file == 'lastsync';
 			if (!isLastSyncFile) {
-				if (!file.match(/\.zip$/) && !file.match(/\.prop$/)) {
+				if (!file.endsWith('.zip') && !file.endsWith('.prop')) {
 					Zotero.debug("Skipping file " + file);
 					continue;
 				}
diff --git a/test/tests/webdavTest.js b/test/tests/webdavTest.js
index ef5264f1a..8d3cac27b 100644
--- a/test/tests/webdavTest.js
+++ b/test/tests/webdavTest.js
@@ -862,6 +862,75 @@ describe("Zotero.Sync.Storage.Mode.WebDAV", function () {
 			Zotero.Prefs.set("lastWebDAVOrphanPurge", Math.round(new Date().getTime() / 1000) - 3600);
 			yield assert.eventually.equal(controller.purgeOrphanedStorageFiles(), false);
 			assertRequestCount(0);
+		});
+		
+		
+		it("should handle unnormalized Unicode characters", function* () {
+			var library = Zotero.Libraries.userLibrary;
+			library.updateLastSyncTime();
+			yield library.saveTx();
+			
+			const daysBeforeSyncTime = 7;
+			
+			var beforeTime = new Date(Date.now() - (daysBeforeSyncTime * 86400 * 1000 + 1)).toUTCString();
+			var currentTime = new Date(Date.now() - 3600000).toUTCString();
+			
+			var strC = '\u1E9B\u0323';
+			var encodedStrC = encodeURIComponent(strC);
+			var strD = '\u1E9B\u0323'.normalize('NFD');
+			var encodedStrD = encodeURIComponent(strD);
+			
+			setResponse({
+				method: "PROPFIND",
+				url: `${encodedStrC}/zotero/`,
+				status: 207,
+				headers: {
+					"Content-Type": 'text/xml; charset="utf-8"'
+				},
+				text: '<?xml version="1.0" encoding="utf-8"?>'
+					+ '<D:multistatus xmlns:D="DAV:" xmlns:ns0="DAV:">'
+						+ '<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">'
+							+ `<D:href>${davBasePath}${encodedStrD}/zotero/</D:href>`
+							+ '<D:propstat>'
+								+ '<D:prop>'
+								+ `<lp1:getlastmodified>${beforeTime}</lp1:getlastmodified>`
+								+ '</D:prop>'
+								+ '<D:status>HTTP/1.1 200 OK</D:status>'
+							+ '</D:propstat>'
+						+ '</D:response>'
+						+ '<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">'
+							+ `<D:href>${davBasePath}${encodedStrD}/zotero/lastsync</D:href>`
+							+ '<D:propstat>'
+								+ '<D:prop>'
+								+ `<lp1:getlastmodified>${beforeTime}</lp1:getlastmodified>`
+								+ '</D:prop>'
+								+ '<D:status>HTTP/1.1 200 OK</D:status>'
+							+ '</D:propstat>'
+						+ '</D:response>'
+						
+						+ '<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">'
+							+ `<D:href>${davBasePath}${encodedStrD}/zotero/AAAAAAAA.zip</D:href>`
+							+ '<D:propstat>'
+								+ '<D:prop>'
+								+ `<lp1:getlastmodified>${beforeTime}</lp1:getlastmodified>`
+								+ '</D:prop>'
+								+ '<D:status>HTTP/1.1 200 OK</D:status>'
+							+ '</D:propstat>'
+						+ '</D:response>'
+						+ '<D:response xmlns:lp1="DAV:" xmlns:lp2="http://apache.org/dav/props/">'
+							+ `<D:href>${davBasePath}${encodedStrD}/zotero/AAAAAAAA.prop</D:href>`
+							+ '<D:propstat>'
+								+ '<D:prop>'
+								+ `<lp1:getlastmodified>${beforeTime}</lp1:getlastmodified>`
+								+ '</D:prop>'
+								+ '<D:status>HTTP/1.1 200 OK</D:status>'
+							+ '</D:propstat>'
+						+ '</D:response>'
+					+ '</D:multistatus>'
+			});
+			
+			Zotero.Prefs.set("sync.storage.url", davHostPath + strC + "/");
+			yield controller.purgeOrphanedStorageFiles();
 		})
 	})
 })