When trying to upgrade an old install i get message that 2.05+ is available. As a first step in compforupdate the updater will be updated. For this it downloads updater.zip

It results in Error : PCLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature
Looking at the downloaded zip file I see:
object(PclZip)#33 (5) {
["zipname"]=>
string(76) "/var/www/update.limesurvey.org/web/app/tmp/updatepackages/updater-120919.zip"
["zip_fd"]=>
int(0)
["error_code"]=>
int(-4)
["error_string"]=>
string(92) "File '/var/www/update.limesurvey.org/tmp/LimeSurvey/admin/update/updater.php' does not exist"
["magic_quotes_status"]=>
int(-1)
}
string(76) "/var/www/update.limesurvey.org/web/app/tmp/updatepackages/updater-120919.zip"

I've seen that the same problem appeared one year ago: https://bugs.limesurvey.org/view.php?id=9013