Some cards are not printed properly or have been altered/clarified by FFG for various reasons. Here are the known errors or community changes for those cards, so you have a reference with the correct or up-to-date information.
These cards are not official, but are based on official rulings and/or FAQ changes.
You can find the errata list here, which breaks down which changes are official and coming with reprints down the line, and which ones were made by the community.
Errata
Art Errata
Hall of Heroes 