[SalesForce] Is it posible to upload Change sets from Production to Sandbox

You're smack in the middle of a release cycle for the Winter '14 release of Salesforce, which brings version 29.0 of the API. Sandboxes are typically upgraded at least a month in advance of the production release, which is why your code in the sandbox is on version 29.0. You can choose your API version however on your metadata components. You have two options:

1) roll back your code to version 28.0 of the API to deploy now.

2) Wait for your instance to be upgraded to Winter '14, either this weekend or next weekend. The release schedule can be determined for your server at http://trust.salesforce.com/

If you deploy a change set with only the custom object and fields none of the profile permissions will be copied over and you will need to manually set the permissions in the destination org.

If you want to copy over profile permissions when you create a change set you need to include your profiles in the section 'Profile Settings For Included Components'. This will then deploy the following changes for the included components:

• Assigned apps
• Custom object permissions
• Custom field permissions
• Apex class access
• Visualforce page access

Note: These settings are only deployed for the included components:

For custom object permissions, custom field permissions, Visualforce page access, and Apex class access, always include supporting components in the change set. For example, object permissions for the custom object Items are included only if the Items object is also included.

See https://help.salesforce.com/apex/HTViewHelpDoc?id=changesets_perm_sets_profiles.htm&language=en_US for further information.