zotero no longer loads/shows my library (ubuntu, after upgrade to karmic)

OK - I'm not sure if these are related, but I have just tried to use zotero the first time after I upgraded ubuntu from jaunty to karmic. Initially I only got the "Loading items list" shown, and never any of my library items, regardless of which collection I select etc.

To be sure, I re-installed firefox (3.5.4), and created a fresh profile with only zotero installed. This also only shows "Loading items list" (although of course the library is empty).

If I try to sync (only the database, forgetting file sync for now) I get an error:

[Exception... "Component returned failure code: 0x80630002 [mozIStorageStatement.execute]" nsresult: "0x80630002 (<unknown>)" location: "JS frame :: chrome://zotero/content/xpcom/db.js :: anonymous :: line 136" data: no] [QUERY: UPDATE itemAttachments SET syncState=?] [ERROR: disk I/O error]

the error report corresponding to this is 198149519.

I am completely stuck at the moment and cannot access my library via firefox - it shows up OK online in My Library.

Any suggestions?

Regards, Mark
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