diff --git a/src/addons/math-ml.ts b/src/addons/math-ml.ts
index 8d2f1d8c0..d387da1cb 100644
--- a/src/addons/math-ml.ts
+++ b/src/addons/math-ml.ts
@@ -372,8 +372,12 @@ function scanOperator(stream: MathMLStream, final: number, options) {
     '\\vert': '|',
     '\\Vert': '\u2225',
     '\\mid': '\u2223',
+    '\\{': '{',
+    '\\}': '}',
     '\\lbrace': '{',
     '\\rbrace': '}',
+    '\\lbrack': '[',
+    '\\rbrack': ']',
     '\\lparen': '(',
     '\\rparen': ')',
     '\\langle': '\u27E8',
diff --git a/src/editor/atom-to-ascii-math.ts b/src/editor/atom-to-ascii-math.ts
index a643805b1..f0e852da6 100644
--- a/src/editor/atom-to-ascii-math.ts
+++ b/src/editor/atom-to-ascii-math.ts
@@ -68,6 +68,8 @@ const SPECIAL_OPERATORS = {
   '\\vert': '|',
   '\\Vert': '||',
   '\\mid': '|',
+  '\\lbrack': '[',
+  '\\rbrack': ']',
   '\\lbrace': '{',
   '\\rbrace': '}',
   '\\lparen': '(',
diff --git a/src/public/core-types.ts b/src/public/core-types.ts
index f3646e2c3..aab85b054 100644
--- a/src/public/core-types.ts
+++ b/src/public/core-types.ts
@@ -40,9 +40,8 @@ export type Token = string;
 export type ParseMode = 'math' | 'text' | 'latex';
 
 /**
- * Error code passed to the [[`ErrorListener`]] function.
+ * Error codes returned by the `mf.errors` property.
  *
- * See [[`MathfieldOptions`]], [[`convertLatexToMarkup`]]
  *
  *
     |  | |
@@ -89,10 +88,6 @@ export type LatexSyntaxError<T = ParserErrorCode> = {
   after?: string;
 };
 
-export type ErrorListener<T = ParserErrorCode> = (
-  err: LatexSyntaxError<T>
-) => void;
-
 /**
  * Variants indicate a stylistic alternate for some characters.
  *
diff --git a/src/public/mathfield-element.ts b/src/public/mathfield-element.ts
index 505604a74..7101f316d 100644
--- a/src/public/mathfield-element.ts
+++ b/src/public/mathfield-element.ts
@@ -1297,6 +1297,7 @@ import 'https://unpkg.com/@cortex-js/compute-engine?module';
   }
 
   /**
+   * Return an array of LaTeX syntax errors, if any.
    * @category Accessing and changing the content
    */
   get errors(): LatexSyntaxError[] {
diff --git a/src/public/mathlive-ssr.ts b/src/public/mathlive-ssr.ts
index 9be4351f5..d5314f132 100644
--- a/src/public/mathlive-ssr.ts
+++ b/src/public/mathlive-ssr.ts
@@ -139,8 +139,6 @@ export function validateLatex(s: string): LatexSyntaxError[] {
  * @param options.generateId If true, add an `"extid"` attribute
  * to the MathML nodes with a value matching the `atomID`. This can be used
  * to map items on the screen with their MathML representation or vice-versa.
- * @param options.onError Callback invoked when an error is encountered while
- * parsing the input string.
  *
  * @category Converting
  */
diff --git a/src/public/virtual-keyboard.ts b/src/public/virtual-keyboard.ts
index 50abef2c3..c64d93be8 100644
--- a/src/public/virtual-keyboard.ts
+++ b/src/public/virtual-keyboard.ts
@@ -51,7 +51,7 @@ export interface VirtualKeyboardKeycap {
    * CSS classes to apply to the keycap.
    *
    * - `tex`: use the TeX font for its label.
-   *    Using the tex class is not necessary if using the latex property to
+   *    Using the tex class is not necessary if using the `latex` property to
    *    define the label.
    * - `shift`: a shift key
    * - `small`: display the label in a smaller size
diff --git a/src/virtual-keyboard/data.ts b/src/virtual-keyboard/data.ts
index 221ee3e18..9124c2ca4 100644
--- a/src/virtual-keyboard/data.ts
+++ b/src/virtual-keyboard/data.ts
@@ -115,7 +115,7 @@ export const LAYOUTS: Partial<
             { latex: '\\iiint', class: 'small' },
             { latex: '\\oint', class: 'small' },
             '\\mathrm{d}x',
-            { latex: '\\dfrac{\\rd}{\\rd x}', class: 'small' },
+            { latex: '\\dfrac{\\mathrm{d}}{\\mathrm{d} x}', class: 'small' },
             { latex: '\\frac{\\partial}{\\partial x}', class: 'small' },
 
             '\\partial',
@@ -607,7 +607,7 @@ export const LAYOUTS: Partial<
 
           variants: [
             '\\mathrm{d}x',
-            { latex: '\\dfrac{\\rd}{\\rd x}', class: 'small' },
+            { latex: '\\dfrac{\\mathrm{d}}{\\mathrm{d} x}', class: 'small' },
             { latex: '\\frac{\\partial}{\\partial x}', class: 'small' },
 
             '\\partial',