The information displayed in sidebar for "release details" and "additional details" seems to change between tabs of a release.
"Release" -> Date / Country / Label / Catalog number / Barcode / Format / Type / Status / Language / Script / Quality
"Relationships -> Date / Barcode / Quality
"Disc IDs" -> Date / Barcode / Format / Quality
"Tags" -> Date / Barcode / Quality
"Details" -> Date / Barcode / Quality