Error when upgrading to WP2.8

I receive similar errors on all of the dashboard pages The blog itself looks fine:

Warning: gzinflate() [function.gzinflate]: data error in C:\xampp\htdocs\wordpress\wp-includes\http.php on line 1787

Warning: gzuncompress() [function.gzuncompress]: data error in C:\xampp\htdocs\wordpress\wp-includes\http.php on line 1792

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\wordpress\wp-includes\http.php:1787) in C:\xampp\htdocs\wordpress\wp-includes\functions.php on line 784

Warning: Cannot modify header information - headers already sent by (output started at C:\xampp\htdocs\wordpress\wp-includes\http.php:1787) in C:\xampp\htdocs\wordpress\wp-includes\functions.php on line 785

I’ve tried deactivating and removing all plugins, and switching to the default theme, with no affect.

Not exactly the same thing but look at https://core.trac.wordpress.org/ticket/10104 and try this:

Download this and install it over wp-includes/http.php.
http://core.trac.wordpress.org/export/11450/trunk/wp-includes/http.php

I am getting the same error in my sidebar. I think it’s due to the theme I’m using which has Twitter function.

Here’s a screenshot:
http://kttns.org/kzzgy

I’ve tried replacing the original http.php with the mentioned http.php but it’s still there.

Can someone suggest how I can fix this? I am not very familiar with the coding.

I only receive the warnings from last.fm for WordPress plugin, so I’ve disabled it for the time being.
Replacing the http.php didn’t make the errors go away for me.

The last.fm plugin is old and is clearly not compatible with WordPress 2.8. I suspect it just might be updated soon though as the developer’s own site has that same error showing on it 😉
I’d recommend uninstalling it and waiting for an updated plugin.

I tried to perform an instant upgrade to WP 2.8 and my process page said “done” even though there was no indication that the different steps (downloading upgrade file etc) were being completed. I refreshed and nothing changed so I thought maybe my IE browser wasn’t responding. I closed the tab and when I returned to the wp admin url, I received the following error instead of the sign in form:

Fatal error: Call to undefined method WordPress_Module::_weak_escape() in /home/majorla/public_html/wp-includes/wp-db.php on line 487

I am unable to sign into my dashboard at all and my home page also shows this error.

My hosting control panel works as does the site’s email. How do I restore the backup or otherwise obtain access to my dashboard?

I was unable to gain access through FileZilla as well. I get the following error through FileZilla

530 Login authentication failed

Thanks,

Laura

I found this same error after doing a manual install.

Simply reuploaded the ‘http.php’ file – the same one that was in the 2.8 download and that fixed it.

Thanks @michaelh for suggesting it – never would have guessed it was that easy.