I just received an email from authorized.net that says...

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The transaction ID, or x_trans_id, is specified as a 10-digit integer. If you use the transaction ID in any of your own applications or databases, it is critical that you verify that your system is architected to accept a value that exceeds 2,147,483,647. Failure to accommodate values larger than 2,147,483,647 will result in your system's inability to accept Authorize.Net transactions.
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If you need to make updates to your transaction ID architecture, you must do so prior to September 1, 2008.
"

I don't know if they are sending us this message now because they changed the length of transaction id or something else. But does anyone know if this is a problem or not if I'm using ZenCart's Authorize.net payment module?