Upgrade to 4.2.1 error
 

I'm getting this error:
Module: vbblog, Step 17 Error.

Failed to write css files. Please make sure that the directory 'clientscript/vbulletin_css' is writable.
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clientscript/vbulletin_css is CHMOD 777, as is all the folders within it. How do I proceed from here?

Thanks.

Maybe your server is running i safe_mode?

In AdminCP > Settings > Options > Server Settings and Optimization Options

There is an option:- Safe Mode Upload Enabled
If your server runs PHP with SAFE MODE Restrictions, set this to yes.

That may do it, not entirely sure though.

Its not a safe_mode issue.

The parent folder & children must be writable by the webserver.

755 or below should only be required on clientscript.

777 should be required depending on server setup, ie running in suphp would allow lower chmod permissions.

Who is the owner & group on those folders?

safe_modes basic/original function was to try to make a secure enviroment for broken scripts, so in other words it wont let you write out side of the parent your user has access to, that includes the /tmp folder you would even place above your public_html folder.

Question what are the permissions have you set for that folder

According to his 1st post 777

You could check the settings, make it save css in the database i.e. templates instead of files, run the upgrade script, then once done change it back ;).

AdminCP > Settings > Options > Style & Language Settings

Now look for "Store CSS Stylesheets as Files?"

Always more than one way to skin a cat, although I would NEVER - I love cats :p.