As a quick follow up, I've been obsessively checking and rechecking, and just now the notes and attachments came back online, in sync with the local copy. I have an over 700MB library so I was concerned. Although I remain perplexed about why things sometimes show up and sometimes don't, I'm happy to see I can access my full library online when necessary!

It's rather perplexing. When I look on the Zotero website from one of the PCs that I have Zotero loaded on locally, the notes, attachments, and .pdfs still don't show up - although they are on my local system. (And some of these attachments have been in my library many months.)

When I access the Zotero website from my iPad through Safari, everything shows up online. I didn't realize there was a difference between the two. When I sent the last message, I just checked my iPad. I assumed that when the notes and attachments suddenly appeared on the Zotero website on my iPad that it would have mirrored the site on Firefox. But in checking just now, the problem of missing notes and attachments remains when I access Firefox through the PC. I have the latest version of Zotero - 3.0. My Firefox version is 11.0.

What's also strange is that when I access the Zotero website through the iPad on Safari, I have the option of sorting the library by creator, date, or author, whereas that functionality doesn't exist when I access the Zotero website through my PC via Firefox.

I should also say that I only just recently received this iPad as a gift and have done very little with it, but I did bookmark Zotero in Safari because I wanted to get a sense of the online capability of Zotero since I don't have the option of having a local copy of Zotero on the iPad. This is what prompted the exploration.

I hope this makes sense - I'm very confused...

Thanks for the message. Unfortunately, the link about syncing is not the issue because it's not that I can't find the attachments, the attachments are simply not showing up on the Zotero website. I get no message about attachments missing, etc. The interesting thing is that they are showing up on my brand new iPad which has literally nothing on it except the Safari web browser.

I'm sorry if I'm not being clear. I have only one account and I am not speaking about anything other than viewing my Zotero library on the actual web on the PC on which everything is stored - from my local Zotero library to all the copies of the .pdfs. If any computer should work and show all the attachments it would be this one. Although it shouldn't matter what machine or browser you use to view the website, it surprisingly does matter in this case.

I have put links to three images below:

The first image is from my Zotero library on the Zotero website from within the iPad via Safari. It shows the handy little arrow by the "Creator" field and shows the listings alphabetically sorted by Author - something which does not show up outside of when I view the website from the iPad.

http://imageshack.us/photo/my-images/38/zoterofromipadcreatorar.png/

The second image is from my Zotero library on the Zotero website from my PC via Firefox. It shows one listing which should have notes and attachments, but which shows none.

http://imageshack.us/photo/my-images/543/zoterofrompcfirefoxatta.png/

The third image is the same listing as the one above, which should have notes and attachments. As you can see, notes and .pdfs are indeed present when I view this listing in my Zotero library on the Zotero website from my iPad via Safari.

http://imageshack.us/photo/my-images/41/zoterofromipadsafariatt.png/

In short, I have only account, and as you can see, what appears on the web from within the different browsers and machines is markedly different.

Do you have javascript enabled on your PC, or any plugins like NoScript that would interfere with the page running javascript?
You can check if it's enabled in the Firefox preferences on the Content tab.

Try reloading your library without the cache (ctrl-shift-R) and clearing your zotero.org cookies (Preferences > Privacy).

What version of firefox and windows are you on now?

edit: also what is the url in the address bar on that page?

You should upgrade Firefox if you can. And you might also see if a fresh firefox profile works.

I will work on this and let you know how it works!

OK, great. You'll want to transfer your Zotero data directory from the old profile directory to the new one, as well as your old Firefox data (though you'll want to do the latter one part at a time to make sure you don't reproduce the problem.