For those wanting to know what bug fixes are in Pro Tools 12.5 here's the full list from Avid.

OS X UI Sluggishness In Pro Tools

• Fixed a set of severe UI sluggishness cases when using OS X El Capitan

Audio Bursts In Pro Tools

• Fixed a noise burst that was reproduced and solved through steps provided by users from the Avid Pro Audio Community that could occur when playing back automation on non-HDX playback engines.

Video Engine Issues Fixed In Pro Tools

• Improved some cases with delayed start of playback with AJA Kona card
• Video frame movements no longer occur when stopping playback with Insertion Follows Playback enabled
• Fixed a case where the video engine takes a long time to load on certain systems
• It is now possible to import MXF OP1a created by Adobe Premiere
• Fixed cases where imported DV Video started 3 frames earlier than the same video opened in QuickTime Player
• Fixed several specific cases where Pro Tools would fail to import Apple ProRes files
• Project Type is no longer incorrectly picked for video from AAFs which do not include the first cunk of MXF media
• Optimized (sample mapped) video codecs such as DNxHD and AppleProRes will now show the appropriate checkbox on clips with 23.976 media.
• Fixed a case where video playback failed to stop with audio and then looped indefinitely
• Fixed a crash when cancelling an Online Bounce to QuickTime
• Playing a single frame selection of H.264 video no longer causes "The Avid Video Engine was unable to stop" error followed by a Pro Tools hang
• Audio MXFs created with AMIRA and F55 no longer import out of sync with video
• Fixed a crash when the user clicks "OK" or "Cancel" in the QuickTime Settings window of the Bounce to QuickTime dialog
• Pro Tools no longer throws errant "Some effects were ignored" messages when opening an AAF with rendered FX
• Pro Tools no longer fails with the error "Unable to create thumbnails" after switching active video track in large sessions while the video track is set to Frames view
• Importing a sequence from Interplay no longer fails for 720p59 and 1080p59 project types

Track Freeze Issues Fixed In Pro Tools 12.5

• A Freeze operation no longer fails if the track selection contains a combination of tracks hosting a ReWire plug-in and other tracks
• Fixed a case where HEAT processing would be applied twice on frozen tracks after deactivating and reactivating HEAT globally
• The HEAT Bypass switch is no longer auto-enabled when freezing or unfreezing a track
• The "Coalesce VCA Master Automation" command can now be undone properly on frozen tracks
• Frozen tracks are no longer imported twice when using Import Session Data when the Tempo/Meter Map option is checked
• The "Coalesce VCA Master Automation" command no longer fails if all members of the group are frozen
• Fixed cases where the global settings of HEAT would not be applied correctly when any frozen tracks were present in the session
• MIDI Track Offsets are no longer editable for Instrument Tracks while they are frozen
• Nudging of automation that is not "frozen" on frozen tracks is no longer blocked
• The commands in the "Cut Special" and "Automation" sub-menus of the Edit menu are no longer blocked for selections on frozen tracks
• Fixed graphical issues that occurred while Freezing a track in Playlists track view
• Fixed a case where MIDI notes assigned to a ReWire instrument on an Aux track would all play at once when unfreezing the Aux

Track Commit Issues Fixed In Pro Tools 12.5

• Fixed a case where clips created by using Track Commit to commit an Edit Selection were placed incorrectly
• Fixed a crash when enabling the Follow Main Pan option on a track created by a Track Commit operation
• Fixed a hang that occurred after committing a track with a DownMixer plug-in on it and then removing the DownMixer plug-in
• Fixed a hang that occurred after committing a track with a D-Verb plug-in on it and then removing the D-Verb plug-in
• Fixed cases where the names of clips on committed tracks would inherit names from clips on other tracks that contributed in any way to the signal chain of the audio path committed

General Issues Fixed In Pro Tools 12.5

• The Cut, Copy, and Paste Special sub-menus are no longer missing from the timeline context menu
• Moving clips with the Object Grabber no longer causes the next mouse click to be ignored
• Pro Tools counters no longer display "<Encoding string>" when changing counter type on OS X 10.8.5
• Fixed a case where MIDI Output was not properly assigned when using Import Session Data with the Match Tracks setting for MIDI or Instrument tracks
• The "Select Unused Ignores Parent Clip" option from the clip list is now checked by default
• "Save Copy In.." no longer fails to include clips that are not on the timeline
• VCA solo functionality is no longer deactivated after changing the group's attributes to "Mix Only"
• The Shift+R shortcut to record enable tracks no longer fails to record all tracks in a group
• Fixed an error that caused the Copy to Send command to no longer be undoable
• Fixed errors that prevented the Export Session Info command from capturing the format, stems and number of instances columns for plug-in details in the exported file
• Fixed cases where width-changing plug-ins were over-allocated to DSP slots on HDX cards and caused processing errors
• Fixed a crash when dragging and dropping audio files from the workspace while in Spot mode
• Fixed a case where an audio file's Date Modified attribute was not properly updated after destructive processing when stored on ISIS
• Fixed a case where Pro Tools would crash when closing
• The "Coalesce VCA Master Automation" command no longer fails if the group is deactivated

Control Surfaces

• Plug-in windows no longer fail to open when pressing the Dyn, EQ, or Insert buttons on the S6 CPM while the "Open Plug-Ins on Workstation When Editing" setting is enabled
• Selecting a track in Pro Tools no longer auto-scrolls to the top when selecting past the bank limits of the attached EUCON control surface