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As far as I know, its license is incompatible with other open source licenses due to an advertising clause (all derivative works have to state "based on Truecrypt" somewhere in the documentation or via use of the software). The old four clause BSD license had a similar issue.

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One of the changes in the newly-uploaded version is indeed a change in the license.

It does appear that the authors have removed the advertising clause in this latest license version. Also the section on commercial licensing, some mentions of registered trademarks, and all specific references to the truecrypt.org domain, including email addresses.

However it's unclear if this change is only for Truecrypt 7.2 or can be applied retrospectively to previous versions. As the authors have deleted sizeable portions of the encryption code in this final version, such ambiguity could be problematic.

the devs themselves are anon

no one is going to come after anyone for licensing fees

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