5.7.4.1 fixes a number of important bugs in 5.7.4, including broken dialogs on Windows servers and an inability to edit your site while asset caching is enabled. It is highly recommended for all users of 5.7.

Full 5.7.4.1 Release Notes

Want to get up to speed? Check out all the things that are new with concrete5 version 5.7.4:

5.7.4 Release Notes

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