[2.7.1] gtk-update-icon-cache: The generated cache was invalid

Same here, also Gentoo (are we the only people who actually use gtk-update-icon-cache?), Gtk+ 2.24.6

Using 2.7.1 as well as trunk will generate the following message:
$ gtk-update-icon-cache /usr/share/icons/elementary/
gtk-update-icon-cache: The generated cache was invalid.
$

Also using -f (force) or -i (index-only) options does not help, i.e. I guess there is some issue with the index file.

I managed to fix it. In order to do this I removed the following folders:
./status/48/untitled folder/
./panel/48/temp

Furthermore I fixed the index.theme file to include all available folders, see attached patch.

Actually, the patch is not required to fix the issue, removing the two folders will do (at least for the 2.7.1 release).

I've applied it to trunk.

Daniel reverted your removals in http://bazaar.launchpad.net/~elementarydesign/elementaryicons/trunk/revision/853.
This bug also affects Ubuntu package, by the way.

I'll fix the folders, but for now the problem is in the icon names that the panel is using. It's making it really difficult to supply all the correct icons without having some really ugly visual inconsistencies. So, it's "In Progress"

Is this still an issue?

Yes this is still an issue because I am receiving it on Gentoo right now.

You're trying this with the latest trunk and no older version mixed in? And your gtk-update-icon-cache is up to date? I see there's also a gtk-update-icon-cache-3.0

[Expired for elementary Icons because there has been no activity for 60 days.]

This looks same or related to #962225. I don't know if it should be marked as duplicate, though.

WRT comment#6:

To fix the icon cache generation problem it is enough to delete the 'untiltled folder'.

You can keep the panel/48/temp folder if removing it causues trouble to the panel (though this is really messy and I don't see how and why the panel got to require the icons from ../48/temp, given the same icons are present in ../48/ as well).