When was the piercing sword length nerfed?

I'm working on a wiki article about the history of the game, and it would be great to have help with one little item from 2012 or 2011.
When piercing swords were introduced, they had long strokes like Sealed Swords and Troikas. Because their strokes were also not slow, they were quite deadly in Lockdown. At some point there was an update that silently nerfed their length. I remember that other players noticed it before I did, because I'm not very observant. On 2012 November 12 I finally edited my sword guide to reflect the silent nerf.
So my question for you old-timers is: When did this silent nerf happen?

Thanks very much, Strayed-Faris. That thread is a great find.
If anyone else wants to chime in, I'm still listening.

I decided to read the thread and seems like I was wrong, the nerf happened earlier. one of the posts links to this:
https://forums.spiralknights.com/en/node/63941#comment-525341
and it's related to the art changes made in that day.

Yeah, I saw that post by Nick, which to me is the smoking gun. 2012 September 5. Thanks again.
https://forums.spiralknights.com/en/node/64865
https://forums.spiralknights.com/en/node/64814
....judging by these posts, I would say September 19, 2012. however, I'm saying this solely based on the time stamps. I'm not sure myself, nor do I have any further evidence to back it up. :s