We are using the v2 API to insert pre-formatted campaigns into Constant Contact for sending. Recent changes to the Constant Contact interface are causing two problems. When we click on one of our campaigns we get an error about a new editor with an offer to copy the campaign into the new editor. This works but is a lot of extra work for us to send our newsletters. The old campaign remains in the list and has to be manually deleted. This problem appears somewhat intermittent. It happened for a while in December, stopped, and is happening again now. I'm speculating that the format_type=5 field in the v3 API might tell Constant Contact to use the new editor but this field doesn't seem to be available in the v2 API. The other problem is that square brackets are now treated as reserved characters by the editor so we've had to scrub our subject and messages of them or we get errors.
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