diff --git a/go_cloud/api b/go_cloud/api
index d0b9070..c0b2300 100755
Binary files a/go_cloud/api and b/go_cloud/api differ
diff --git a/go_cloud/internal/http/wopi_handlers.go b/go_cloud/internal/http/wopi_handlers.go
index 0adcad1..a034780 100644
--- a/go_cloud/internal/http/wopi_handlers.go
+++ b/go_cloud/internal/http/wopi_handlers.go
@@ -561,6 +561,7 @@ func wopiPutFileHandler(w http.ResponseWriter, r *http.Request, db *database.DB,
 	defer r.Body.Close()
 	// Check for suggested target (used for export operations like Save as PDF)
 	suggestedTarget := r.Header.Get("X-WOPI-SuggestedTarget")
+	fmt.Printf("[WOPI-EXPORT] X-WOPI-SuggestedTarget header: '%s'\n", suggestedTarget)
 	isExport := suggestedTarget != ""
 
 	var targetFile *database.File
@@ -877,8 +878,11 @@ func collaboraProxyHandler(w http.ResponseWriter, r *http.Request, db *database.
 	// Get the correct Collabora editor URL from discovery (includes version hash)
 	editorURL := getCollaboraEditorURL(collaboraURL)
 
+	// URL-encode the WOPISrc for use in the form action URL (Collabora requires this)
+	encodedWopiSrc := url.QueryEscape(wopiSrc)
+
 	// Build the full Collabora URL with WOPISrc as query parameter
-	collaboraFullURL := fmt.Sprintf("%s?WOPISrc=%s", editorURL, wopiSrc)
+	collaboraFullURL := fmt.Sprintf("%s?WOPISrc=%s", editorURL, encodedWopiSrc)
 
 	// Return HTML page with auto-submitting form
 	// The form POSTs to Collabora with access_token in the body