Links appear to be broken

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It seems links to posts from within posts aren't working.

For example this link should take you to this thread,
Webdialogs for SketchUp ......RIP!, but it doesn't. You get "The requested topic does not exist."
viewtopic.php?f=180?t=52388

There are other links in that thread that aren't linking.
I noticed it a couple of days ago when I tried to link something in an answer and thought it was me being thicker than usual, but now I see it is something else.

[mitcorb]

I noticed something similar on the "Populating a Bookshelf" topic. The first link was fine, but seemed that the links provided by the responders in the referenced thread just hung and never loaded.

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This is another link that comes up empty for me.
viewtopic.php?f=323&t=42267&p=493037&hilit=slicer#p490119

Can it be my browser or the way the links are made. This one is just copy link location of a post and paste, which always worked before .

[mitcorb]

I don't know if my experience is the same as yours. Usually, I right click, open in new tab in Firefox. That's what I did here and it stayed in page loading mode for a significantly long time, until I quit.

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In both FF and Chrome either right clicked or direct I get this page.

[Rich O Brien]

I see the issue....

It's flagged. Thanks for spotting it

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Now if only there was a thumbs up facility.