diff --git a/assets/js/controllers/postedit.js b/assets/js/controllers/postedit.js
index 71328e3..f800c44 100644
--- a/assets/js/controllers/postedit.js
+++ b/assets/js/controllers/postedit.js
@@ -60,6 +60,16 @@ export default class PosteditController extends Controller {
         try {
             const formData = new FormData(this.element);
             let data = Object.fromEntries(formData.entries());
+
+            // Special handling for categories
+            let categoryIDs = [];
+            for (let i of formData.entries()) {
+                if (i[0] === "category_ids") {
+                    categoryIDs.push(parseInt(i[1]))
+                }
+            }
+
+            data["category_ids"] = categoryIDs;
             data = {...data, action: action || 'save'};
 
             const response = await fetch(this.element.getAttribute("action"), {
diff --git a/providers/markdown/renderer.go b/providers/markdown/renderer.go
index aedd184..828ba96 100644
--- a/providers/markdown/renderer.go
+++ b/providers/markdown/renderer.go
@@ -22,7 +22,7 @@ type Renderer struct {
 
 func NewRendererForUI() *Renderer {
 	mdParser := goldmark.New(
-		goldmark.WithExtensions(extension.GFM),
+		goldmark.WithExtensions(extension.GFM, extension.Footnote),
 		goldmark.WithRendererOptions(
 			gm_html.WithUnsafe(),
 		),
@@ -48,7 +48,7 @@ func NewRendererForUI() *Renderer {
 
 func NewRendererForSite() *Renderer {
 	mdParser := goldmark.New(
-		goldmark.WithExtensions(extension.GFM),
+		goldmark.WithExtensions(extension.GFM, extension.Footnote),
 		goldmark.WithParserOptions(
 			parser.WithAutoHeadingID(),
 		),
diff --git a/providers/sitebuilder/builder.go b/providers/sitebuilder/builder.go
index 71ce926..d0bf17b 100644
--- a/providers/sitebuilder/builder.go
+++ b/providers/sitebuilder/builder.go
@@ -49,6 +49,7 @@ func New(site pubmodel.Site, opts Options) (*Builder, error) {
 		mdRenderer: markdown.NewRendererForSite(),
 		postMDProcessors: []postMDProcessor{
 			uploadAbsoluteURL,
+			removeFootnoteHRs,
 		},
 	}, nil
 }
diff --git a/providers/sitebuilder/processors.go b/providers/sitebuilder/processors.go
index c699160..605d077 100644
--- a/providers/sitebuilder/processors.go
+++ b/providers/sitebuilder/processors.go
@@ -35,3 +35,8 @@ func uploadAbsoluteURL(site pubmodel.Site, dom *goquery.Document) error {
 	})
 	return nil
 }
+
+func removeFootnoteHRs(site pubmodel.Site, dom *goquery.Document) error {
+	dom.Find("div.footnotes > hr").Remove()
+	return nil
+}