Wordpress 2.8 Upgrade Problem
Wordpress 2.8 problem – Hi dude, some of you may have message like this when trying upgrade plugins , after upgrade wodpress to version 2.8. You can use this tips for first, I hope yo enjoy this solution.
Incompatible archive PCLZIP_ERR_BAD_FORMAT (-10) : Invalid archive structure.
Solution :
- Wait a minute after upgrade your wordpress to 2.8 and then start to upgarde your plugin one by one.
- If you still got eror and message like “Incompatible archive PCLZIP_ERR_BAD_FORMAT (-10) : Invalid archive structure” again, please try again
- Last but not least, find out to official site of plugin developer to know these plugin compatible up to wp 2.8 or not, if the answer is not copatible to wp 2.8 wait untill the plugin developer upgrade their plugin or try using other plugin taht compatible to wp 2.8
Some of other problem message like this:
Unpacking the core update
Incompatible archive: PCLZIP_ERR_BAD_FORMAT (-10) : Invalid block size : xx
Installation Failed
Usually happen when you upgrade wordpress from 2.6.1 to 2.7.1 version.
Solution is :
- Look at your the PHP version client. Some time it need php4 not php5. Ok.
Wordpress 2.8, Upgrade, Incompatible archive, Problem, Invalid archive structure X PCLZIP, wp upgarade

June 11th, 2009 at 8:45 pm
The solution you have given is incorrect. Check here for the correct resolution to the problem : http://rahulsarin.com/technology/wordpress-2-8-plugin-browser-bug-425/
June 12th, 2009 at 9:43 am
Wordpress team just resolved this problem, read this topic on wordpress forum http://wordpress.org/support/topic/278487 or just download this file http://core.trac.wordpress.org/export/11450/trunk/wp-includes/http.php and update it in your wordpress instalation, put it into wp-includes folder.
June 12th, 2009 at 10:20 am
thanks for your great info Dmitriy