Topic on Project:Support desk

After update from 1.8 to 1.9 class=mediawiki works not correct,because float-right or center without any changes.

Tables only on left site on page.

Bug? or update error?

MW 1.9 is 5 years old. Did you mean 1.19?

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I don't believe we have a css class named "mediawiki" (although I could be mistaken). Are you sure its not a class you yourself added?

If any css files in the skins subdirectory were modified for custom styles, they will be overwritten during an upgrade. Any custom CSS should be in the page MediaWiki:Common.css on your wiki in order to be safe from upgrades.

Yes sorry Mistake is the 1.19.1 – 2012-06-13 and all mod files on the skin and localsettings was safe on local Storage before upgrade.

is posible a donwgrade to the old version 1.8 ?

Downgrading to 1.18 would probably be fine. Downgrading to 1.8 probably won't work. Most schema changes are backwards compatible, but every now and then there are some that aren't (or that are only backwards compatible with limited efficiency like the categorylinks change).

The upgrade between 1.18 -> 1.19 involved the following schema changes:

 200                         array( 'addIndex', 'logging',       'type_action',      'patch-logging-type-action-index.sql'),
 201                         array( 'doMigrateUserOptions' ),
 202                         array( 'dropField', 'user',         'user_options', 'patch-drop-user_options.sql' ),
 203                         array( 'addField', 'revision',      'rev_sha1',         'patch-rev_sha1.sql' ),
 204                         array( 'addField', 'archive',       'ar_sha1',          'patch-ar_sha1.sql' ),
 205                         array( 'addIndex', 'page', 'page_redirect_namespace_len', 'patch-page_redirect_namespace_len.sql' ),
 206                         array( 'modifyField', 'user_groups', 'ug_group', 'patch-ug_group-length-increase.sql' ),
 207                         array( 'addField',      'uploadstash',  'us_chunk_inx',         'patch-uploadstash_chunk.sql' ),
 208                         array( 'addfield', 'job',           'job_timestamp',    'patch-jobs-add-timestamp.sql' ),
 209                         array( 'modifyField', 'user_former_groups', 'ufg_group', 'patch-ufg_group-length-increase.sql' ),

All of these should be backwards compatible with 1.18 (Although the user_options field was dropped, that hasn't been in use since like 1.15). Thus you should be able to just change your version of MediaWiki to 1.18 and everything would still work. However: The same is not true of MediaWiki 1.8, and I would be shocked if 1.8 worked with a 1.19 schema