diff --git a/package.json b/package.json
index 0a01a7a6e..46b10636b 100644
--- a/package.json
+++ b/package.json
@@ -19,9 +19,9 @@
         "jest": "node build/jest",
         "typedoc": "cross-env NODE_OPTIONS=--max_old_space_size=8192 typedoc",
         "debug:all": "node --async-stack-traces --trace-deprecation --enable-source-maps build/start --debug --template",
-        "debug": "node --async-stack-traces --trace-deprecation --enable-source-maps node_modules/.bin/hydrooj --debug --template",
+        "debug": "node --async-stack-traces --trace-deprecation --enable-source-maps node_modules/hydrooj/bin/hydrooj --debug --template",
         "start:all": "node build/start",
-        "start": "node node_modules/.bin/hydrooj",
+        "start": "node_modules/.bin/hydrooj",
         "clean": "zsh -c \"rm -rf tsconfig.build.tsbuildinfo ./packages/*/tsconfig.tsbuildinfo ./packages/*/dist ./.coverage\""
     },
     "version": "1.0.0",
diff --git a/packages/ui-default/components/zipDownloader/index.js b/packages/ui-default/components/zipDownloader/index.js
index ffb8ba375..4d93774e7 100644
--- a/packages/ui-default/components/zipDownloader/index.js
+++ b/packages/ui-default/components/zipDownloader/index.js
@@ -1,4 +1,5 @@
 import { dump } from 'js-yaml';
+import * as streamsaver from 'streamsaver';
 import { createZipStream } from 'vj/utils/zip';
 import pipeStream from 'vj/utils/pipeStream';
 import i18n from 'vj/utils/i18n';
@@ -13,14 +14,13 @@ function onBeforeUnload(e) {
   }
   e.returnValue = '';
 }
+if (window.location.protocol === 'https:'
+  || window.location.protocol === 'chrome-extension:'
+  || window.location.hostname === 'localhost') {
+  streamsaver.mitm = '/streamsaver/mitm.html';
+}
 
 export default async function download(name, targets) {
-  const streamsaver = await import('streamsaver');
-  if (window.location.protocol === 'https:'
-    || window.location.protocol === 'chrome-extension:'
-    || window.location.hostname === 'localhost') {
-    streamsaver.mitm = '/streamsaver/mitm.html';
-  }
   if (!window.WritableStream) {
     window.WritableStream = (await import('web-streams-polyfill/dist/ponyfill.es6')).WritableStream;
     streamsaver.WritableStream = window.WritableStream;
@@ -66,19 +66,19 @@ export async function downloadProblemSet(pids) {
   const targets = [];
   for (const pid of pids) {
     const { pdoc } = await request.get(`/d/${UiContext.domainId}/p/${pid}`);
-    targets.push({ filename: `/d/${UiContext.domainId}/p/${pid}/problem.yaml`, content: dump(pdoc) });
+    targets.push({ filename: `${pid}/problem.yaml`, content: dump(pdoc) });
     let { links } = await request.post(
       `/d/${UiContext.domainId}/p/${pid}/files`,
       { operation: 'get_links', files: pdoc.data.map((i) => i.name), type: 'testdata' }
     );
     for (const filename of Object.keys(links)) {
-      targets.push({ filename: `/d/${UiContext.domainId}/p/${pid}/testdata/${filename}`, url: links[filename] });
+      targets.push({ filename: `${pid}/testdata/${filename}`, url: links[filename] });
     }
     ({ links } = await request.post(`/d/${UiContext.domainId}/p/${pid}/files`, {
       operation: 'get_links', files: pdoc.additional_file.map((i) => i.name), type: 'additional_file',
     }));
     for (const filename of Object.keys(links)) {
-      targets.push({ filename: `/d/${UiContext.domainId}/p/${pid}/additional_file/${filename}`, url: links[filename] });
+      targets.push({ filename: `${pid}/additional_file/${filename}`, url: links[filename] });
     }
   }
   await download('Export.zip', targets);
diff --git a/packages/ui-default/misc/typography.styl b/packages/ui-default/misc/typography.styl
index a133ab015..71d4520b8 100644
--- a/packages/ui-default/misc/typography.styl
+++ b/packages/ui-default/misc/typography.styl
@@ -254,16 +254,18 @@ small, figcaption
     &:not(.user-profile-name)
       color: $primary-color
 
-.typo p, .typo dl, .typo form, .typo hr, .typo table
+.typo dl, .typo form, .typo hr, .typo table
   padding-top: 0.3em
   padding-bottom: 0.3em
 
 .typo li, .typo ol
-  padding-top: 0.2em
-  padding-bottom: 0.2em
+  padding-top: 0.1em
+  padding-bottom: 0.1em
   line-height: 1.25
 
 .typo p
+  padding-top: 0.17em
+  padding-bottom: 0.17em
   line-height: 1.5
   font-size: inherit
 
diff --git a/packages/ui-default/pages/problem_main.page.js b/packages/ui-default/pages/problem_main.page.js
index ce34da832..b236f6377 100644
--- a/packages/ui-default/pages/problem_main.page.js
+++ b/packages/ui-default/pages/problem_main.page.js
@@ -226,6 +226,12 @@ const page = new NamedPage(['problem_main', 'problem_category'], () => {
     ev.preventDefault();
     updateSelection();
   });
+  $(document).on('click', 'a.pager__item', (ev) => {
+    ev.preventDefault();
+    pjax.request({ url: $(ev.currentTarget).attr('href') }).then(() => {
+      window.scrollTo(0, 0);
+    });
+  });
 });
 
 export default page;
diff --git a/packages/ui-default/templates/problem_main.html b/packages/ui-default/templates/problem_main.html
index d434e83d1..5cb9b79dd 100644
--- a/packages/ui-default/templates/problem_main.html
+++ b/packages/ui-default/templates/problem_main.html
@@ -37,7 +37,7 @@
                 {{ _('Unhide Selected') }}
               </a>
               <a href="javascript:;" class="menu__link display-mode-hide" name="download_selected_problems">
-                <span class="icon icon-delete"></span>
+                <span class="icon icon-download"></span>
                 {{ _('Download Selected') }}
               </a>
               <a href="javascript:;" class="menu__link display-mode-hide" name="remove_selected_problems">