buzz wrote:

In an attempt to clarify this issue, here are the steps to reproduce.

1. install SVN version of mediawiki. LocalSettings will contain $wgLanguageCode = "en";
2. edit MediaWiki:Common.css and add something like "body { background-color: #ddd}";
3. refresh and see the background changes.
4. change user preferences to en-GB and refresh. still can see common.css changes.
5. go to Special:AllMessages and search for Modified messages for language en. common.css shows up with our customisations.
6. edit LocalSettings.php and change $wgLanguageCode = "en" to $wgLanguageCode = "en-gb"
7. refresh and MediaWiki:Common.css changes are not showing.
8. search for modified messages for language en. No results.
9. search for modified messages for language en-GB. one result - common.css however, it shows the contents of the "modification" as identical to the default value.

Original /* CSS placed here will be applied to all skins */
Modified : /* CSS placed here will be applied to all skins */

this bug is causing me big problems trying to change the default language. I'm upgrading it to major. downgrade if you disagree, but I hope someone can give me some feedback on this.

Can someone please check if it happens on 1.15?

buzz wrote:

I have just checked. behaviour is different on 1.15.1

7. refresh and MediaWiki:Common.css changes are not showing.
8. on 1.15 they are showing

9. search for modified messages for language en-GB. one result - common.css

however, it shows the contents of the "modification" as identical to the
default value.

• on 1.15 you can search for modified messages and the common.css shows up with the changes

Just clear the message cache, or wait for it to expire. The issue occurs because when $wgLanguageCode is en, the en-gb message cache stores only the en-gb customisations, and there aren't any so it's an empty array. When you change $wgLanguageCode to en-gb, the cache key is now meant to have all the default customisations, without any slash in the title, but it still has the empty array cached from before.

If you're using CACHE_DB, run the SQL query:

sql> TRUNCATE TABLE objectcache;

If you're using CACHE_MEMCACHED:

$ /etc/init.d/memcached restart

Alternatively, delete the problematic cache key:

$ cd /path/to/wiki/maintenance
$ php eval.php
> $wgMemc->delete( "$wgDBname:messages:en-gb" );

buzz wrote:

Thanks. This has solved it for me.