5.3:
Added Ring of Peace [Monk]
Added Hand of Protection [Paladin]
Fixed Storm Bolt [Warrior]
Added SyncFrames support

5.2:
Added Web Wrap (Shale Spider) [Hunter]
Fixed Fists of Fury [Monk]
Added Blood Horror [Warlock]
Removed Seduction (Grimoire of Sacrifice) [Warlock]
Added Warbringer (Snare) [Warrior]
Fixed issue with pet icon not hiding after pet is dismissed
Added option to hide arena enemy icons in battlegrounds

5.1:
Re-added support for Perl, XPerl, and LUI unit frames.
Added Bash (Force of Nature - Feral Treants) [Druid]
Added Entangling Roots (Force of Nature - Balance Treants) [Druid]
Added Lock Jaw (Dog) [Hunter]
Removed Beastial Wrath [Hunter pet]
Added Fists of Fury [Monk]
Added Fear (Glyph of Fear) [Warlock]
Added Infernal Awakening [Warlock]
Added Seduction (Grimoire of Sacrifice) [Warlock]
Added Spell Lock (Grimoire of Sacrifice) [Warlock]
Added Optical Blast (Observer) [Warlock]
Added Sluggish (Glyph of Hindering Strikes) [Warrior]
Added Storm Bolt [Warrior]
Improved the way unit frames register for events for better performance.
Added text labels to unlocked frames.
Added option to disable party icons while in battlegrounds. It is located on the "Party" options menu.

5.02:
Added Entangling Roots (Druid, Nature's Grasp)
Fixed Petrifying Gaze (Hunter pet, Basilisk)

5.01:
Added Pounce (Druid, Incarnation)
Added Lullaby (Hunter pet, Crane)
Added Paralyzing Quill (Hunter pet, Porcupine)
Added Petrifying Gaze (Hunter pet, Basilisk)
Added Holy Word: Chastise (Priest)
Added Dark Bargain (Warlock)
Fixed Fear (Warlock)
Fixed Arcane Torrent

5.0:
Updated for patch 5.0.
Now matches on spellId instead of spell name.
Added "Other" spell category.
Removed older PvE content spells.
Added spell priorities.
UNIT_AURA events now only generate one update call total instead of one per unit frame.
Reworked options menu.
Party and Arena Enemy frame settings can be changed for all frames in the group simultaneously.
Improved slash command parsing.
Added debug slash commands.
Temporarily removed support for non-Blizzard unit frames.

4.3:
Updated for patch 4.3.
Added pet frame support.
Added Portuguese language support.
Added LUI support (credit: Zerotorescue)

4.21:
Fixed spellID for Hungering Cold.

4.2:
TOC bump for patch 4.2.

4.1:
Updated for patch 4.1.
Added Bad Manner (Hunter pet).

4.08:
Added Ring of Frost (Mage).
Added Smoke Bomb (Rogue).
Added Shadowsnare (Glyph of Shadowflame) (Warlock).
Added Dispersion (Priest).
Updated German translation (credit: Morbis).
Updated Chinese translation (credit: 狂飙).

4.07:
Fixed Solar Beam (Druid).
Removed Ravage (Hunter).
Updated Chinese translation (credit: fatalerror).

4.06:
Added Axe Toss (Felguard).

4.05:
Added Grounding Totem to spell immunities.

4.04:
Added Unstable Affliction silence (Warlock).

4.03:
Fixed Seal of Justice (Paladin).

4.02:
Fixed settings not saving.
Removed Skull Bash (Druid).
Fixed Avenger's Shield (Paladin).

4.01:
Updated for patch 4.0.1 compatibility.
Added spell immunity tracking.

3.33:
Added Freezing Arrow Effect (Hunter).
Added Ferocious Butt (Icehowl).
Fixed: Unlock option only shows enabled frames.

3.32:
Fixed bug on startup when updating settings from older version.
Fixed possible bug with tracking options on non-English clients.
Immunity tracking no longer tracks self.

3.31:
Fixed bug on startup when settings file doesn't exist.
Fixed bug where a buff could appear as a debuff (Impact).
Turned off immunity tracking by default (consumes less CPU time).
Small performance improvements.

3.3:
Updated for patch 3.3 compatibility.
Graceful upgrade from 3.22 (settings won't reset).
Removed Improved Fire Nova Totem spell ID.
Changed Target and Focus portrait frame references to match Blizzard's.
Added immunity effect tracking (Bladestorm, Divine Shield, Ice Block, The Beast Within).
Removed strata options (too buggy atm).
Fixed frames not hiding at start.
Added basic command line options:
/lc reset
/lc lock
/lc unlock
/lc enable <unit>
/lc disable <unit>
where <unit> can be: player, target, focus, party1 ... party4, arena1 ... arena5

3.22:
Changed versioning scheme to match WoW client's.
Added Cobalt Frag Bomb to spell list.
Added support for Perl and XPerl unit frames.
Added arena enemy unit frame support.
Fixed bug where debuff icons would sometimes not overlay the unit portrait correctly.
Improved performance when unit frames are hidden.
Reworked options menu.
Added settings for individual frame strata.

1.42:
Fixed Wyvern Sting to no longer show dot effect.
Fixed Freezing Trap not displaying.
Added Nature's Fury (Freya) to PvE list.
Added Mark of the Faceless (General Vezax) to PvE list.

1.41:
Fixed a bug with icons not hiding after changing targets/focus.
Removed Psychic Horror disarm effect (horrify effect still remains).
Better integration with the standard Blizzard UI.
- Target, focus, and party icons will now display within their appropriate unit portrait.
- Note: You can manually adjust their position to bring them out of the portrait. You should do this if you want to use LoseControl with non-standard UI frames. However, the only way to undo this is to reset LoseControl to its default settings.
Updated German and Russian translations.
Consolidated all localization files into one for easier translation.

1.4:
WoW 3.1 patch support.
Support for Target/Focus/Party frames.
Removed Min/Max debuff duration options.
Death Knight:
Glyph of Blood Boil is now Glyph of Heart Strike.
Added Desecration snare.
Druid:
Added Typhoon snare.
Hunter:
Removed T.N.T. stun.
Removed Improved Wing Clip root.
Mage:
Added Fiery Payback disarm.
Added Frostfire Bolt snare.
Paladin:
Added Shield of the Templar silence.
Priest:
Removed Blackout stun.
Added Psychic Horror (horror + disarm).
Shaman:
Added Earthgrab root (Storm, Earth and Fire talent).
Added Freeze root (Frozen Power talent).
Warlock:
Removed Pyroclasm stun.
Added Aftermath snare.
PvE:
Added Gravity Bomb and Light Bomb (XT-002 Deconstructor)

1.31
Added hunter pet abilities, Chilblains, Frost Grenades.
Added PvE debuffs: Mutating Injection (Grobbulus), Positive/Negative Charge (Thaddius), Detonate Mana (Kel'Thuzad)
Added minimum and maximum debuff duration options.

1.3
Converted to spellIds.
Added random proc CCs (Impact, Blackout, etc).
Added tracking for silence, disarm, root, and snare effects.
Added slash commands to access the options menu.
Settings saved per character instead of per account.
Fixed bug with overlapping the same CC effect.
Fixed bug with Wyvern Sting DOT component.

1.23
Added option to disable CooldownCount/OmniCC text.

1.22
Added Korean support (credit: sayclub).

1.21
Added Chinese support (credit: 饺子).

1.2
Added German, Spanish, French, and Russian support.

1.12
Added Cower in Fear and Gnaw for Death Knights and removed Glyph of Frost Strike.
Added a few fringe case spells like Turn Evil and Shackle Undead that can work on players under certain effects (i.e. Lichborne, Metamorphasis).
Made frame movable, resizable, and added adjustable transparency.
Options can be configured in the AddOns Interface Options.