diff --git a/anoncaptcha/README.md b/anoncaptcha/README.md
index d567135..ec434b0 100644
--- a/anoncaptcha/README.md
+++ b/anoncaptcha/README.md
@@ -3,7 +3,7 @@ AnonCaptcha Addon
 
 Adds a math-based captcha for anonymous commenters to prevent spam.
 
-When enabled, anonymous visitors who wish to leave a comment must solve a simple addition problem (e.g. "What is 12 + 37?").
+When enabled, anonymous visitors who wish to leave a comment must solve a simple addition problem.
 
 Based on Zotlabs hook system.
 
diff --git a/anoncaptcha/anoncaptcha.php b/anoncaptcha/anoncaptcha.php
index 89d9f2e..5ae568f 100644
--- a/anoncaptcha/anoncaptcha.php
+++ b/anoncaptcha/anoncaptcha.php
@@ -2,7 +2,7 @@
 /**
  * Name: AnonCaptcha
  * Description: Adds a math captcha for anonymous commenters to prevent spam
- * Version: 0.91
+ * Version: 0.92
  * Author: ivan zlax <@zlax@ussr.win>
  * Maintainer: ivan zlax <@zlax@ussr.win>
  */
@@ -218,11 +218,17 @@ if(typeof jQuery!=='undefined'){
     jQuery(document).ajaxComplete(function(event, xhr, settings){
         if(settings && settings.url && settings.url.indexOf('item')!==-1){
             dc('ajaxComplete for item request, url='+settings.url);
+            dc('responseStatus='+xhr.status+' responseLength='+xhr.responseText.length);
             try{
-                var resp = JSON.parse(xhr.responseText);
-                dc('response parsed, captcha_fail='+resp.captcha_fail);
-                if(resp && resp.captcha_fail){
-                    alert(resp.error_msg || 'Captcha failed');
+                if(xhr.responseText){
+                    var resp = JSON.parse(xhr.responseText);
+                    dc('response parsed, captcha_fail='+resp.captcha_fail);
+                    if(resp && resp.captcha_fail){
+                        alert(resp.error_msg || 'Captcha failed');
+                    }
+                } else {
+                    dc('empty response from server');
+                    dc('check if anoncaptcha_token is in form data');
                 }
             }catch(e){
                 dc('error parsing response: '+e.message);
@@ -280,17 +286,17 @@ function addC(){
 }
 // Try immediately
 addC();
-// If no elements found, retry up to 25 times with 400ms delay (10 seconds total)
+// If no elements found, retry up to 30 times with 300ms delay (9 seconds total)
 // Hubzilla loads comment forms via AJAX after initial page load
 if(document.querySelectorAll('[id^="comment-edit-anon"]').length===0){
     var retries=0;
     var retry=setInterval(function(){
         retries++;
         addC();
-        if(retries>=25 || document.querySelectorAll('[id^="comment-edit-anon"]').length>0){
+        if(retries>=30 || document.querySelectorAll('[id^="comment-edit-anon"]').length>0){
             clearInterval(retry);
         }
-    },400);
+    },300);
 }
 // Observe for dynamically added comment forms
 if(typeof MutationObserver!=="undefined"){