diff --git a/unpacked/extensions/asciimath2jax.js b/unpacked/extensions/asciimath2jax.js
index d94d1d066..c9c334991 100644
--- a/unpacked/extensions/asciimath2jax.js
+++ b/unpacked/extensions/asciimath2jax.js
@@ -230,5 +230,10 @@ MathJax.Extension.asciimath2jax = {
   
 };
 
+// We register the preprocessors with the following priorities:
+// - mml2jax.js: 5
+// - jsMath2jax.js: 8
+// - asciimath2jax.js, tex2jax.js: 10 (default)
+// See issues 18 and 484 and the other *2jax.js files.
 MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.asciimath2jax]);
 MathJax.Ajax.loadComplete("[MathJax]/extensions/asciimath2jax.js");
diff --git a/unpacked/extensions/jsMath2jax.js b/unpacked/extensions/jsMath2jax.js
index 3de5e7720..cd81c60ab 100644
--- a/unpacked/extensions/jsMath2jax.js
+++ b/unpacked/extensions/jsMath2jax.js
@@ -93,5 +93,10 @@ MathJax.Extension.jsMath2jax = {
   
 };
 
+// We register the preprocessors with the following priorities:
+// - mml2jax.js: 5
+// - jsMath2jax.js: 8
+// - asciimath2jax.js, tex2jax.js: 10 (default)
+// See issues 18 and 484 and the other *2jax.js files.
 MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.jsMath2jax],8);
 MathJax.Ajax.loadComplete("[MathJax]/extensions/jsMath2jax.js");
diff --git a/unpacked/extensions/mml2jax.js b/unpacked/extensions/mml2jax.js
index 1110a31ce..b946f7332 100644
--- a/unpacked/extensions/mml2jax.js
+++ b/unpacked/extensions/mml2jax.js
@@ -207,5 +207,10 @@ MathJax.Extension.mml2jax = {
 
 };
 
-MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.mml2jax]);
+// We register the preprocessors with the following priorities:
+// - mml2jax.js: 5
+// - jsMath2jax.js: 8
+// - asciimath2jax.js, tex2jax.js: 10 (default)
+// See issues 18 and 484 and the other *2jax.js files.
+MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.mml2jax],5);
 MathJax.Ajax.loadComplete("[MathJax]/extensions/mml2jax.js");
diff --git a/unpacked/extensions/tex2jax.js b/unpacked/extensions/tex2jax.js
index 10a70bd2e..fc70d685f 100644
--- a/unpacked/extensions/tex2jax.js
+++ b/unpacked/extensions/tex2jax.js
@@ -300,5 +300,10 @@ MathJax.Extension.tex2jax = {
   
 };
 
+// We register the preprocessors with the following priorities:
+// - mml2jax.js: 5
+// - jsMath2jax.js: 8
+// - asciimath2jax.js, tex2jax.js: 10 (default)
+// See issues 18 and 484 and the other *2jax.js files.
 MathJax.Hub.Register.PreProcessor(["PreProcess",MathJax.Extension.tex2jax]);
 MathJax.Ajax.loadComplete("[MathJax]/extensions/tex2jax.js");