Try to add another line in top of /plugins/_archives.plugin.php
I can't replicate the error in my local install, though.

load_class( '_core/ui/results/_results.class.php', 'Results' );
load_class( '/items/model/_itemlistlight.class.php', 'ItemListLight' );

BTW have you copied plugins from an older install ?

sam2kb wrote:

BTW have you copied plugins from an older install ?

I did not delete anything when I upgraded, so it is possible.

Now I get:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 24 bytes) in /.../inc/locales/_locale.funcs.php on line 88

That's where your errors come from!

You supposed to keep media folder and your [u]custom[/u] skin and custom plugins only. Then [u]merge[/u] config files, and not copy them over new ones.

Hmm, so maybe get rid of the "inc" folder and start with a fresh one?

Not only inc folder, you need to get rid of all folders except for media. and then copy your skin and plugins (only those that don't come with b2evo)

Use [url=http://winmerge.org/]Winmerge[/url] to find the differences in config files /conf

Excellent, I have done what you said, and now this is the administration error I see at the bottom of the "home" blog admin, the one that aggregates 3 other blogs:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 80 bytes) in /.../inc/_core/model/_timer.class.php on line 280

It appears to happen when it has listed the categories and is trying to list the posts.

Oh, and the initial ItemListLight error is still taking place.

Have you fixed it already? I don't see errors on this page http://www.comiclist.com/index.php/lists/?disp=arcdir

Sort of- I can no longer tell it to show the archives in a simple post by post list. Has to be weekly or monthly.

I know this post is a little old, but I am having the same problem.
http://www.rhinomangraphics.com/lightscribe/

I just switched my archive to be post by post and alphabetical. I don't know if it worked prior to this as I had not used the archive feature, and just now linked to it.
Any help would be greatly appreciated.
I am on the latest 4.x version