I upgraded to 1.2.5 and now all of my plugins say this:
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v Error parsing plugin_version string! Try removing semicolons from string.
I have no clue what I did, but I'm really hoping this is something simple.

I also tried the latest nightly build, but get the same error.

This is caused by an error the source script, specifically in the line that sets the version. Not sure how this might have happened. The line should read $plugin_version = '1.0.0'; (This is what is in my copy of the 1.2.5 release files.