Ever had this happen?
You open the file requester in a GTK app to open or save a file, but the names don’t come with icons so it’s kind of hard to tell the difference between a folder and a file without extension.
Here’s the reason: your KDE styles have been updated but the gtk icon cache was not refreshed.
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And here is the solution: run the following command as root to refresh all icon caches:
for i in /usr/share/icons/*; do [ -d $i ] && gtk-update-icon-cache $i; done