Rapid movement causing d/c?

Since you said Flash Jump, I'll make an accusation. I have a thought that it's connected to thief skills. I'm not entirely sure, but every time I walk onto this specific tile WHILE UNDER DARK SIGHT, I DC. Same thing; solid black screen immediately then go to the channel select. My level of Dark Sight is low (don't know how speed is affected with upper levels) so I have negative speed. Perhaps the glitch is connected to skill-based speed? Dunno, just guessing.

 Spoiler

Sorry if I'm breaking into this conversation with a different glitch or anything disruptive.