From some point, after years of using gimp, I found out that it has a strange bug when trying to drag a new guide from the ruler or an existing guide from a previously saved file.
Gimp: Fixing Problem with Guides [SOLVED]
gimp
From some point, after years of using gimp, I found out that it has a strange bug when trying to drag a new guide from the ruler or an existing guide from a previously saved file.