Last error: Existing item 15242 exists in cache in Zotero.DataObjects.reload()
                    I am using the latest version of 1.5 on three computers: one Mac and two Windows XP Professional.  On my Windows laptop, I get the above message (or Last error: Existing item 15242 exists in cache in Zotero.DataObjects.reload() in it's fullest version).  No matter how many times I request a sync, I get this message.  Any bright ideas?                
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I'm having the same problem. I recently received the following error 'existing item exists in cache' (#264460049). How can I resolve this?
Here is the readout:
[JavaScript Error: "[Exception... "'[Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [mozIStorageStatement.execute]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: chrome://zotero/content/xpcom/data/collection.js :: anonymous :: line 502" data: no] [ERROR: constraint failed]' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]"]
[JavaScript Error: "[Exception... "'Existing item 16884 exists in cache in Zotero.DataObjects.reload()' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]"]
Thanks,
NH
klabadorf: You should feel free to reinstall Google Chrome. The "chrome" mentioned in error messages in Firefox is not a reference to Google Chrome.
[JavaScript Error: "[Exception... "'Existing item 1807600 exists in cache in Zotero.DataObjects.reload()' when calling method: [nsIDOMEventListener::handleEvent]" nsresult: "0x8057001e (NS_ERROR_XPC_JS_THREW_STRING)" location: "<unknown>" data: no]"]
report id 1883849587
Regards,
Jon.
Jon, in your case the error is "Delete reconciliation unimplemented for collections", which happens if you modify a collection remotely (including item membership) but delete it locally. We'll support this eventually, but for the moment you'll need to use one of the Sync->Reset options in the Zotero preferences.