Revealing mistake: The blond dead victim blinks her eyes when the CSI agents are checking her body. It is right after the CSI says something about her lividity.

Not What It Looks Like - S3-E2
Revealing mistake: When the three thieves destroy the jewelry cases, the case in the middle of the room doesn't shatter. (00:01:15)
Not What It Looks Like - S3-E2
Revealing mistake: After Danny breaks the glass in the lab allegedly using sound waves, you can see in the shot immediately after the glass breaks, a thin green laser beam from roughly further top left to near bottom right. It's assumed this is what actually broke the glass.
Suggested correction: Theoretically correct, but it can be argued that the only evidence present is the bullet (which has DNA and prints burnt off when fired) and the body (which can only be handled by the MEs) gloves are not required.
Andy Benham ★
What utter rubbish. No CSI would enter a crime scene without first putting on latex gloves - it is a carved-in-stone rule.
Exactly. Since Mac, Stella and Danny were processing a crime scene, they would need to wear gloves because without them, they would have contaminated a crime scene by not only getting their fingerprints over everything but, if one of them got a cut or scrape, their DNA would also be thrown into the mix and any defense attorney can call them out on their carelessness and have any evidence thrown out.