Versioning or version control is the ability to assign numbers to documents to thereby associate (and lock) changes made to a particular document by a particular user to a particular version number. Every time a document is updated, a document management system should keep track of these updates through versioning. You can choose to apply version control to both components if your requirements call for it.Documents can be given whole numbers, such as 1.0, 2.0, etc., which are called major versions, but they can also be assigned numbers such as 1.2, 1.3, etc., which are then called a minor versions. Share Point supports versioning on lists and libraries, so also on form libraries, which means that you can keep track of all of the changes made to a particular Info Path form and revert to (or restore) an older version of the Info Path form if necessary.In theory, Info Path is supposed to prompt you to let you know that the server version has changed and allows you to update your local cached version.In reality, this seems to either not always happen or users aren't understanding and therefore not updating their local cache.I have deactivated and republished but that didn't help. I have few people pickers on Info Path form which are tied to the respective Share Point List columns.
I have followed the instructions at upgrade an infopath form in SP2010.Now I have to edit the people picker property to accept multiple values.I make the change in the infopath form and Publish the form.Upload Form Template and upload your published Info Path form.Then, as long as the list is associated with the form, when you create a new item, you will see the new Info Path form.