Did you perhaps mean “smallpox?”
One that I never see discussed online is in the original Footloose. When they first show the kids at the prom standing around bored (before Kevin Bacon gets them dancing), one prom goer is obviously a guy wearing a prom dress. I guess they had a shortage of female extras that day.
I noticed when I saw Die Hard 2 in the theaters that the pay phones in the Washington, DC airport were labeled “Pac Bell” (the west coast phone company at the time). This was later fixed in the video release.
One of my favorites was Bruce Willis’ ear pierced ear in Unbreakable.
In a few of the aerial scenes in Pearl Harbor, a few of the ships below hadn’t been built yet.
There’s a Newport class LST (Landing Ship, Tank) down there, and they weren’t built until the 70’s (I served on one for over 5 years - they’re pretty unique in design)
Microphone boom visible at top for frame in Annie Hall. I believe it was the lobster cooking scene.
In Stripes when Winger goes AWOL in the motor pool and Ziskey (Harlod Ramis) is on top of Murray banging his head on the concrete. But when the two MP’s pull up Murray has his head on a duffel bag.
I’d swear they did a shot of some Spruance class destroyers moored line abreast somewhere in the actual Pearl Harbor battle.
It always annoys me when people put the Stormtrooper bumping his head on lists like that. Yeah they probably would have reshot it if they had noticed. But someone in a full face helmet with shitty peripheral vision, while entering a potential hostile situation,on a door that was jimmied and didn’t open right, fits perfectly well in the scene.
Especially with the sound effect added in the 23rd final collector’s director’s fanboy’s cut.
Why is that a goof? It’s perfectly reasonable for a 40yo man in 1995 to have a pierced ear and not necessarily wear an earring any more.
Birdemic.
The whole thing.
Because he either has a freakish healing factor that woulda shoulda closed the piercing, or should not have been pierceable in the first place. Either way, the guy who walked away from the horrific train and car wrecks without a scratch shouldn’t have been in danger from a piercing gun.
In I Love Trouble, there are multiple instances where you can see the boom mic hanging from the top of the scene.
What about just dragging a post or iron frame behind a horse to scrape a road smooth? Was that in practice in that time?
The “travel across country” scenes early in “Silverado” are funny in this way. If you know your great American South-West, you can see that they wander across immense expanses of land, far more than the premise of the film suggests. It isn’t a “blooper” exactly, just a rather substantial indulgence of artistic license.
Shit that’s nothing. In the scenes over Hickham Airfield the CGI attacking planes are carrying torpedoes!
Not necessarily a film blooper, but the ABC show GCB took place in Dallas. It was a guilty pleasure for some of us, because IIRC, the pilot was shot in the city. We initially watched it, if only to spot various landmarks or familiar locales. It was so cheesy, it got us hooked.
Well, eventually, I guess they moved production to California, because one episode centered around a barbecue. In the background, you could see some mountains. Mountains in the DFW area. Pretty much all of my friends caught that and had a good laugh.
(*Cheaters *also filmed a great deal of their episodes in Dallas, and so we’ll watch that for the same reason. I saw a “confrontation” once, and at one point, a friend was hired to play “the other man” for an episode. He took the role and has some good stories from the experience.)
Pearl Harbor may have been bad, but the Mother of All Such Films has to be Midway:
The end of the movie, with the angled-deck carrier, the crowd of obviously-not-1942-people gathered on the dock in the background, and Henry Fonda’s “Maybe-we-really-aren’t-better-than-the-Japs” speech, never fails to leave me laughing! 
I think the point was that if he was really unbreakable, then his ear would be un-pierceable as well. That’s really a nit though. He also had a shaved face and trimmed hair and nails.
What did most people miss?