When opening PDFs from various sources, I often receive a JS pop up stating "This pdf form requires a newer version of Adobe Acrobat...", in spite of having the latest version of Reader (23.008.20555 as of this post) installed. There are often multiple (as on 3-7+) popup dialogs that repeat this message whether OK or Cancel is pushed (the only difference being OK opens a browser window to redownload what I already have).

The PDFs in question are often generated by 3rd parties, E.G. Tax preparation software online. One such recent example used iText 2.0.7, which uses PDF version 1.5 (Acrobat 6.x) to generate a client's 2023 US tax paperwork.

Disabling JavaScript is the only way to disable these incorrect warnings. However, when doing so, a large yellow banner then brands the document with a warning that the document uses JS for some features, which may or may not apply. It can't then be dismissed. If enabled for use though, which may be necessary to completely view a document, the same series of warnings once again surfaces unnecessarily.

I have found this irritating and very problematic BUG across a variety of PDF documents over the past few years. This needs to be addressed in Acrobat itself IMHO. If the version of Acrobat in use is newer than the document opened, this should not happen. The version check is failing.