To Fix a Bug on 4.0.11:
[4.0.11] Topic Feed Filters Not Applying - https://community.invisionpower.com/4docs/knowledgebase/4011-topic-feed-filters-not-applying-r157/
[4.0.11] Downloads and Screenshots not working - https://community.invisionpower.com/4docs/knowledgebase/4011-downloads-and-screenshots-not-working-r158/
[4.0.11] Email notifications not working for Commerce - https://community.invisionpower.com/4docs/knowledgebase/4011-email-notifications-not-working-for-commerce-r159/
Sorry, I'm just share it