diff --git a/copyparty/__init__.py b/copyparty/__init__.py
index 0b0e5683..cf7e50f0 100644
--- a/copyparty/__init__.py
+++ b/copyparty/__init__.py
@@ -42,10 +42,7 @@ class EnvParams(object):
         self.t0 = time.time()
         self.mod = None
         self.cfg = None
-        try:
-            self.ox = sys.oxidized
-        except:
-            self.ox = False
+        self.ox = getattr(sys, "oxidized", None)
 
 
 E = EnvParams()
diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index b186eb5a..deb16013 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -822,6 +822,7 @@ class HttpCli(object):
             fn = os.devnull
 
         params.update(open_ka)
+        assert fn
 
         if rnd and not self.args.nw:
             fn = self.rand_name(fdir, fn, rnd)
diff --git a/copyparty/util.py b/copyparty/util.py
index 05314b93..0b5e9288 100644
--- a/copyparty/util.py
+++ b/copyparty/util.py
@@ -686,14 +686,16 @@ class Magician(object):
 
         mime = magic.from_file(fpath, mime=True)
         mime = re.split("[; ]", mime, 1)[0]
-        ret = EXTS.get(mime)
+        try:
+            return EXTS[mime]
+        except:
+            pass
 
-        if not ret:
-            mg = mimetypes.guess_extension(mime)
-            if mg:
-                return mg[1:]
-            else:
-                raise Exception()
+        mg = mimetypes.guess_extension(mime)
+        if mg:
+            return mg[1:]
+        else:
+            raise Exception()
 
 
 class Garda(object):
diff --git a/copyparty/web/browser.css b/copyparty/web/browser.css
index 13a0835a..97571fcf 100644
--- a/copyparty/web/browser.css
+++ b/copyparty/web/browser.css
@@ -2811,6 +2811,7 @@ html.b #tree li {
 html.b #tree li {
 	margin-left: .8em;
 }
+html.b #docul a,
 html.b .ntree a {
 	padding: .6em .2em;
 }
diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index f6a0d5f6..9f06b0e7 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -471,7 +471,7 @@ var Ls = {
 
 		"utl_name": "filnavn",
 		"utl_stat": "status",
-		"utl_prog": "progresjon",
+		"utl_prog": "fremdrift",
 
 		"ul_flagblk": "filene har blitt lagt i køen</b><br>men det er en annen nettleserfane som holder på med befaring eller opplastning akkurat nå,<br>så venter til den er ferdig først",
 
@@ -5039,7 +5039,7 @@ var treectl = (function () {
 
 	r.reqls = function (url, hpush, back) {
 		var xhr = new XHR();
-		xhr.top = url;
+		xhr.top = url.split('?')[0];
 		xhr.back = back
 		xhr.hpush = hpush;
 		xhr.ts = Date.now();
@@ -5102,7 +5102,7 @@ var treectl = (function () {
 		if (this.hpush && !showfile.active())
 			hist_push(this.top);
 
-		if (!this.back && !treectl.hidden) {
+		if (!this.back) {
 			var dirs = [];
 			for (var a = 0; a < res.dirs.length; a++)
 				dirs.push(res.dirs[a].href.split('/')[0].split('?')[0]);
diff --git a/copyparty/web/util.js b/copyparty/web/util.js
index e469da80..4d6e6f64 100644
--- a/copyparty/web/util.js
+++ b/copyparty/web/util.js
@@ -235,7 +235,7 @@ function ev(e) {
         return;
 
     if (e.preventDefault)
-        e.preventDefault()
+        e.preventDefault();
 
     if (e.stopPropagation)
         e.stopPropagation();
diff --git a/scripts/make-sfx.sh b/scripts/make-sfx.sh
index ad51e55a..3ea39ae2 100755
--- a/scripts/make-sfx.sh
+++ b/scripts/make-sfx.sh
@@ -120,7 +120,7 @@ tmpdir="$(
 )"
 
 [ $repack ] && {
-	old="$tmpdir/pe-copyparty"
+	old="$tmpdir/pe-copyparty.$(id -u)"
 	echo "repack of files in $old"
 	cp -pR "$old/"*{py2,j2,ftp,copyparty} .
 }