I just upgraded silverstripe-powered page from 2.3.3 to 2.4.1 and along i have upgraded to 0.4 blog.

After dev/build when i first opened the page, the blogsidebar was there.

Now, it dissapeared, eventhough firebug indicates div id = BlogSideBar, but its empty.

When i logged in to CMS, i could see that there are no widgets added to the blog holder (right side).
By widgets i mean the standard ones, available out-of-box with blog module.

Dragging and dropping them from left to right doesnt work (i only get to select part of the text inside those widgets)
Clicking on the arrow inside of widget doesnt do anything, but firebug's console shows this error coming from ../cms/javascript/WidgetAreaEditor.js:

$("WidgetAreaEditor-" + widgetArea) is null [Break on this error] $('WidgetAreaEditor-'+widgetArea).addWidget(className, widgetArea);

I tried to replicate the error today, but i got:
$("WidgetAreaEditor-" + widgetArea) is null
[Break on this error] </li>

Any hints appreciated as site is live on client's server
qlex

I had the same problem and I located it to the template file for WidgetAreaEditor. I don't know exactly where the problem lied but I think it had to do with apaches caches. I edited cms/templates/WidgetAreaEditor.ss and the problem dissapeared. (made change, saved, changed back, saved). It will probably be sufficient to restart apache or touch the file.

Diger_s: thanx a lot, it worked for me !

To blog creators - could this tip be copied over to wiki ?

Qlex