For my end of the biz, the biggest offenders are:

"socket" for sprocket

"internnment" or "interrmettant" for intermittent (The part of the projector that steps each frame into the projection position and holds it steady while being flashed onto the screen) And yeah, I do tend to spell it both as "intermittent" and "intermittant" [Linked Image]

"Zenon" or "Neon" for xenon (the most common projection bulb in use today)

Oh, and on that: It is a Xenon bulb that goes into the lamp (or lamphouse). The folks who do live theater get into a twist because for thier lighting, the source is always a "lamp", never a "bulb."

Oh yeah, and it's theatre for cinema and theater for the stage and live shows. Major peeve of mine. [Linked Image]

"Projectionists do it at 24fps." [Linked Image]

Stupid should be painful.