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POPSVocabulary permissions module suffers from a "Drupal limitation" "User A creates a node and applies some terms from various vocabs. Now, user B comes along and edits the node. But user B has some vocabs removed from his node edit page by your module. Now when user B submits the node form Drupal removes ALL terms in ALL vocabs, then re-adds them. However, it cannot "re-add" terms that you didn't allow user B to have. So, effectively user B has managed to deleted terms in vocabs she didn't have access to."
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POPSDrupal vs. WordPress: Which is better for blogging? Drupal is more a result of a strategic choice. For example for people/organisations that has some sort of strategy for how they are going to (re)use and grow with their data (and competence) in the long run. If you only need a modern blog, Drupal is overkill. For a web site or community that is setting up a solution that shall offer blogging as part of other features, however, it is more relevant to consider Drupal. An aspect that should not be taken lightly, is the nature of open source when it comes to staying on top of all bugs and security fixes. A blogger that cannot administer security issues alone, might be in the situation where it is a choice between a free Wordpress hosted (and maintained) blog, or paying for a maintained Drupal site somewhere.