Change Set upload errors.

When we upload a changeset from sandbox to production we are getting the following error message. We dont get as far as changeset validation on production, it fails on upload. Any ideas?

The following outbound change set upload failed due to a system error:
Change set: 2nd Configuration Change Set v1 (04t250000000tlM)
Organization: CS1 (Developer Sandbox) (00D250000000WN8)
User: CloudSymphony (005D0000005iqCL)
Error Number: 1721215233-11260565 (245827274)

Please try to upload your change set again. If it does not succeed, contact Customer Support and provide the error number listed above.
The following outbound change set upload failed due to a system error:

Change set: 2nd Configuration Change Set v1 (04t250000000tlM)
Organization: CS1 (Developer Sandbox) (00D250000000WN8)
User: CloudSymphony (005D0000005iqCL)
Error Number: 1721215233-11260565 (245827274)

Please try to upload your change set again. If it does not succeed, contact Customer Support and provide the error number listed above.