I've seen people, not just Wild fans, use this picture to say the play leading to the game 5 tieing goal should have been be offsides:



Just for clarification, let's check the NHL rulebook for what constitutes offsides: (emphasis mine)

The position of the player’s skates and not that of his stick shall be the determining factor in all instances in deciding an off-side. A player is off-side when both skates are completely over the leadingedge of the blue line involved in the play.

A player is on-side when either of his skates are in contact with, or on his own side of the line, at the instant the puck completely crosses the leadingedge of the blueline regardless of the position of his stick. However, a player actually controlling the puck who shall cross the line ahead of the puck shall not be considered “off-side,” provided he had possession and control of the puck prior to his skates crossing the blue line.

i.e: The skate doesn't have to touch the ice if it's behind the blueline (and it clearly is), just be behind the line. According to official NHL rules, that's clearly an onside play.

(NOTE: As someone who writes requirements for a living, which is basically rules, this is not good wording. What this says is that it's onside of a player has his skate on the blueline or his skate is behind the line [touching ice or not]. That seems confusing, to be honest.)

(NOTE #2: A screenshot is an instant in time. The time it took the Avs to cross the blueline here was less than a second. Easy. Now look at the linesman in that photo, who appears to be getting a worse look or ducking from, something. That's a 1/10ths of second call. It's extremely close. Acting like it's a clear call is nonsense.)