Me too. I have the same error.
I'm using the Java Client Library for Spreadsheets to access data in a
Spreadsheet. When I try a spreadsheetService.query using the ListFeed I have
the same error but it works only if I open the spreadsheet in Google Docs
previously through the GUI. After the error, the spreadsheet is lock a
couple of minutes in the GUI. It began to happen two days ago.
My code:
ListQuery listQuery=new ListQuery(wsEntry.getListFeedUrl());
listQuery.setSpreadsheetQuery("name=John");
ListFeed feed=spreadsheetService.query(listQuery,ListFeed.class);