Highlights:

Improvements

Under the hood Library refactor (Mac)
Canon PTP tethering engine
Re-factored Next Capture Adjustments for Orientation
Re-factored Next Capture Adjustments to allow Metadata in adjustments
Improved handling of Tiff assets that include Alpha channels or Layers (view only)
Various improvements to Keyboard shortcut menu

New Features

New: Rotatable live view (as part of Orientation refactor)
New: Color Editor tools: Saturation, Hue and Lightness uniformity for Color Editor
New: Export/Output Keyword List restrictions 
New: Shortcuts for Reset Counters
New: Shortcuts for fill/invert mask and change/cycle layers
New: Shortcuts for “Select by…”
New: Shortcuts for “Create album by…”
New: Shortcuts for “Select by same…”

XF compatible features

Sequence workflow tools:
Create albums from Sequence ID
Filters for sequence types, counts, ID
Name Tokens for sequence types, counts, ID
Dynamic locations for sequence types, counts, ID

9.1 Camera Support

Olympus Pen-F
Olympus Om-D E-M10 Mk II
Sony A68
Sony a6300
Sony RX1R Mk II (revised implementation)
Ricoh GR II
Pentax K-S2
Panasonic G7
Leica SL

9.1 Lens Support

Nikon 24-70E VR
Nikon AF-S DX NIKKOR 18-135mm f/3.5-5.6G IF-ED
Sigma 150-600mm F5-6.3 DG OS HSM (Nikon mount)
Sigma 120-300mm F2.8 DG OS HSM | S (Canon mount)
Carl Zeiss Sonnar T* FE 35 mm F2.8 ZA
Carl Zeiss Sonnar T* E 24 mm F1.8 ZA
Panasonic LUMIX G VARIO 14-42mm F3.5-5.6 ASPH. MEGA O.I.S.
Sony E PZ 16-50 mm F3.5-5.6 OSS (SEL1650) (improved profile)
Sony FE 24-70 2.8 GM (SEL2470GM)
Sony FE 85 1.4 GM

Bug fixes Mac

Browsing images in the importer window causes setting files to be saved on disk
Keywords are added when browsing folders or canceling an import operation
Import and Pack as EIP: imported images show a “1” at the end of their filenames
Library: various bugs (performance, crashes, Smart Album handling)
Camera tool: ISO string badly clipped if too long
Brush size slider does not respond correctly to mouse scrolls
Live View: pixelated images appear on some occasions
Color Editor and Curve tool: undo not always working as expected
Curve tool: cannot edit curves when loupe tool is selected
Curve tool: pickers do not always get selected when clicked
Color Editor: color patches are missing in Express (for Sony)
Keystone: copy/apply buttons always disabled
UI cosmetics (especially Keywords and Keyword Library tools)
Fixed a bug in handling styles for Next Capture Adjustments
Fixed an orientation bug for Next Capture Adjustments
Library tool performance and minor fixes
Fixed crash using IQ3 100MP and FireWire
Keyword Library handling minor fixes
Fixed moire persistency for layers
Fixed an issue for naming duplicate files while batch renaming
Library tool: improve overall UI performance
Library tool: a number of cosmetic bugs (display of icons, expand/collapse)
Next Capture Adjustments: fix handling of Rating and Color Tag
Next Capture Adjustments: fix handling of Crop when Orientation is set to non-default values
Filters tool: properly add new filters to a group
Fix reset of lens distortion when resetting a Variant
Color Editor: fixed undo/redo
Mask drawing: fixed a flickering issue appearing when drawing masks after an undo operation
ICC profile menu: fix a bug causing some custom profiles not to be shown in the menu
Fixed a crash when removing a filter
Fixed a crash in the Curves tool when dragging and entering keyboard shortcuts
Fixed a crash when clicking in empty areas of the Keyboard Shortcut Editor
Fixed a crash when creating/moving collections the Library tool.
Fixed a crash when processing LCC files

Bug fixes Win

Various crashes and hangs
Search only allowed a single search string
Session can not be opened over UNC path
Importing a catalog does not include all images
IPTC getting garbled when using Chinese characters
Main window hangs when trying to recursively import many folders
“Sort selected by Color Tag” does not work.
Active Filters in the Filters tool would remain active even if hidden
Film Grain type drop down disabled when Capture One starts
Pink color Tag improperly mapped to Photoshop urgency
When replacing a style, Capture One deletes the style without saving a new file with the changes.
Sorting of Keywords in the Keyword Library tool is case sensitive
Cannot delete some Keywords from session in Keyword Library
Error Exporting Keyword Library to paths containing exotic characters
Camera tool: pending count slow/not updating when shooting continuously
Selection points on image will move when panning the image
Linked Zoom using Zoom slider in Multi-view mode not working
When creating a Mask from the Color Editor it does not get a selection point
Local Adjustments: Passing over a hidden selection point changes the cursor
Temporary file is not deleted when importing a catalog inside another catalog
Cannot stack built-in Curve presets
Difficult to Crop from bottom of image
Variant collapsed state affects initial filters counts
Camera tool: +/- ISO tab changes size
All Images not updating after image is processed
Import of a Session into a Catalog doesn’t create a collection under “Recent Imports”
Next Capture Adjustments - only one Style can be added
Fixed bug where it was sometimes not possible to remove a Keyword from a Session Keyword Library
ICC-Profile: naming changes when setting it to default for camera
Dragging a Session favorite to Albums does not create an Album
Color Editor: Reset selected tab removes all presets regardless of tab
Improved global modification of Keywords
Crop tool does not respond correctly if Next Capture Adjustments is set away from default
Vignette tool does not reset when Amount title is click-hold
‘Select by Sequence ID’ works as ‘Select All’ if no ID
Vignetting tool is disabled by default
Variants not persisted when making Keyword Library changes in another Collection