diff --git a/contrib/js/backlink.js b/contrib/js/backlink.js
index f32afef..dfcf0cf 100644
--- a/contrib/js/backlink.js
+++ b/contrib/js/backlink.js
@@ -216,6 +216,7 @@ DynReply.prototype.showError = function(msg) {
   console.log("error in dynreply: "+msg);
   this._error.setAttribute("class", "error");
   this._error.appendChild(document.createTextNode(msg));
+  this.updateCaptcha();
 }
 
 DynReply.prototype.showMessage = function(msg) {
@@ -356,6 +357,7 @@ function init(prefix) {
       } else {
         // we're good
         r.showMessage("posted as "+j.message_id);
+        r.updateCaptcha();
       }
     }, function(err) {
       r.showError(err);
diff --git a/contrib/static/nntpchan.js b/contrib/static/nntpchan.js
index 2e1a35b..1d8a4e0 100644
--- a/contrib/static/nntpchan.js
+++ b/contrib/static/nntpchan.js
@@ -30,7 +30,7 @@ DynReply.prototype.setPrefix=function(prefix){this.prefix=prefix;}
 DynReply.prototype.hide=function(){this.elem.style.display='none';}
 DynReply.prototype.setBoard=function(boardname){if(boardname){this.board=boardname;}}
 DynReply.prototype.setRoot=function(roothash){if(roothash){this.roothash=roothash;}}
-DynReply.prototype.showError=function(msg){console.log("error in dynreply: "+msg);this._error.setAttribute("class","error");this._error.appendChild(document.createTextNode(msg));}
+DynReply.prototype.showError=function(msg){console.log("error in dynreply: "+msg);this._error.setAttribute("class","error");this._error.appendChild(document.createTextNode(msg));this.updateCaptcha();}
 DynReply.prototype.showMessage=function(msg){this._error.setAttribute("class","message");this._error.appendChild(document.createTextNode(msg));var e=this._error;setTimeout(function(){e.innerHTML="";},2000);}
 function nntpchan_reply(parent,shorthash){if(parent){var boardname=parent.getAttribute("boardname");var roothash=parent.getAttribute("root");var replyto=getReplyTo();replyto.setBoard(boardname);replyto.setRoot(roothash);replyto.show();}
 var elem=document.getElementById("postform_message");if(elem)
@@ -43,7 +43,7 @@ parent.appendChild(wrapper);parent.backlink=false;},function(msg){var wrapper=do
 parent.backlink=true;}};parent.backlink=true;}
 function inject_hover_for_element(elem){var elems=elem.getElementsByClassName("backlink");var ls=[];var l=elems.length;for(var idx=0;idx<l;idx++){var e=elems[idx];ls.push(e);}
 for(var elem in ls){inject_hover(prefix,ls[elem]);}}
-function init(prefix){inject_hover_for_element(document);var rpl=getReplyTo();rpl.setPrefix(prefix);var e=rpl.elem;e.setAttribute("draggable","true");var mouseDownX,mouseDownY;var originalX=window.screenX-150;var originalY=10;rpl.moveTo(originalX,originalY);e.addEventListener("dragstart",function(ev){mouseDownX=ev.clientX;mouseDownY=ev.clientY;},false);e.addEventListener("dragend",function(ev){var x=originalX+ev.clientX-mouseDownX;var y=originalY+ev.clientY-mouseDownY;x-=window.screenLeft;y-=window.screenTop;rpl.moveTo(x,y);originalX=x;originalY=y;},false);e=document.getElementById("postform_submit");e.onclick=function(){var f=document.querySelector("form");var r=getReplyTo();r.post(function(j){if(j.error){r.showError(j.error);}else{r.showMessage("posted as "+j.message_id);}},function(err){r.showError(err);});r.showMessage("posting... ");}}
+function init(prefix){inject_hover_for_element(document);var rpl=getReplyTo();rpl.setPrefix(prefix);var e=rpl.elem;e.setAttribute("draggable","true");var mouseDownX,mouseDownY;var originalX=window.screenX-150;var originalY=10;rpl.moveTo(originalX,originalY);e.addEventListener("dragstart",function(ev){mouseDownX=ev.clientX;mouseDownY=ev.clientY;},false);e.addEventListener("dragend",function(ev){var x=originalX+ev.clientX-mouseDownX;var y=originalY+ev.clientY-mouseDownY;x-=window.screenLeft;y-=window.screenTop;rpl.moveTo(x,y);originalX=x;originalY=y;},false);e=document.getElementById("postform_submit");e.onclick=function(){var f=document.querySelector("form");var r=getReplyTo();r.post(function(j){if(j.error){r.showError(j.error);}else{r.showMessage("posted as "+j.message_id);r.updateCaptcha();}},function(err){r.showError(err);});r.showMessage("posting... ");}}
 /* ./contrib/js/banner.js */
 var banner_count=3;function nntpchan_inject_banners(elem,prefix){var n=Math.floor(Math.random()*banner_count);var banner=prefix+"static/banner_"+n+".jpg";var e=document.createElement("img");e.src=banner;e.id="nntpchan_banner";elem.appendChild(e);}
 /* ./contrib/js/expand-image.js */