Hi,
The AdWords API Sandbox's database is scheduled to be refreshed today, Thursday, June 3rd. We apologize for the late notice. Following the refresh all data stored in the sandbox will be cleared, and AdWords API v13 users will have to recreate their client accounts with a call to getClientAccounts(). More information on the sandbox environment and our periodic refreshes is available at:
http://code.google.com/apis/adwords/docs/developer/adwords_api_sandbox.htmlBest,
- Eric Koleda, AdWords API Team