Hello, I noticed this whilst working on getting advanced forum working on my site, but after chatting with Michelle it seems it has nothing to do with the forum module. My breadcrumbs work for forum and topic lists, but disappear when you view a topic. They also work fine for the rest of the site but disappear when I go to the articles page (which is run by the articles module).
I'm using denver theme, but this problem still occurs on bluemarine and garland
Breadcrumbs:
http://www.carabusonline.co.uk/en/forum/introduce-yourself
No breadcrumbs :(
http://www.carabusonline.co.uk/en/forum/first-one
I'm also having a similar problem with tabs disappearing on the article page and on many of the ubercart admin pages. Often these tabs are quite important so it would be nice to have them back - any idea how to reclaim them? They appear fine on many other pages, so why would they disappear on those ones?