Firefox problem with Bloglines?

These days I'm using Firefox more and more on a regular basis. This means from now on I'll also us it to read my bolog via Bloglines. Yesterday I opened a BL folder with *a lot* of blog posts, which was handled OK by FF (that is instead of 142 unread items, there were 0 left. However, this morning using IE, I noticed IE still mentioned 142+ items unread. It seems the FF connection did somehow not synchronise with the server. I'll investigate this further. For the moment: is someone aware of this issue. Guess I won't be the first one with this 'problem'