I have the same problem, every time when i send several update (near 10 per one minute)
"The remote server returned an error: (500) Internal Server Error." When i try open spreadsheets using Google Docs i receive *We're sorry.* We're sorry, a server error occurred. Please wait a bit and try reloading your spreadsheet. Find out more at the Google Docs Help Center<http://docs.google.com/support?hl=en> .
