Notice: Undefined index: path in ctools_get_plugins() (line 247

Can you please try this with latest CTools -dev and let me know if it still happens? Quite a few changes have gone into -dev lately.

Set this 'active' again if it still happens with latest -dev.

Today I have updated to:

calendar 7.x-3.0-alpha2+4-dev (2012-Jan-21)
Chaos tool suite (ctools) 7.x-1.0-rc1+115-dev (2012-Jan-22)
date 7.x-2.0-rc1+76-dev (2012-Jan-22)
jquery_update 7.x-2.1+7-dev (2012-Jan-18)
Localization update 7.x-1.0-beta2+27-dev (2012-Jan-22)
Link checker 7.x-1.x-dev (2012-Jan-20)
Migrate 7.x-2.2+82-dev (2012-Jan-18)
Profile 2 7.x-1.2+1-dev (2012-Jan-16)
Views 7.x-3.1+19-dev (2012-Jan-22)

Then I run update.php.

I get the SAME error-message:
Notice: Undefined index: path in ctools_get_plugins() (Line 247 of xxxxxxx\sites\all\modules\ctools\includes\plugins.inc).

Ok, looks like this came in as part of this commit:

#1371700: CTools adds cached plugins with wrong paths during hook_registry_files_alter() in multisite systems

I also have this problem with the latest dev version.

I am not the only user, who has problems.

I have only a one site installation.

Please help.
Thanks

Yep -- after you said it was reverted I reinstalled the dev version, cleared the caches, and still had the same problem.

It is absolutely impossible to have "the same" problem after I made the revert, because the line referenced no longer exists.

And that does not make this not a duplicate.