I have successfully upgraded to Silverstripe 2.4.0. However, the Archive Widget no longer works. I upgraded to one one of the daily trunk archives for the blog module (r105495). Does anyone know how to get it working again.
The Tag Cloud widget also doesn't work, but that hasn't worked for a while now. I have searched for methods to get it working again, but have found nothing that works (deleting the widget, rebuilding and reinstalling only causes database trouble). Any ideas on how to get it working again would be welcome.
I've just upgraded to 2.4 and had same problem. Looked in database and for some reason each of the Widgets listed in the Widget table had the Enabled value set to 0. I changed these all to 1 and my widgets re-appeared.
I had a look in the widgets table, and they were enabled. There were some old entries that I deleted. However, I discovered that my theme's tag cloud template was out of date. Fixing that resulted in both widgets suddenly working.
Maybe the archive widget was failing because the error in the tag cloud widget above it screwed things up somehow. No idea really, but it's working now. :-)