[Radiant] Issues with the new tree admin extension and with the admin tree expansion

[Luigi Rizzo]

Hello.

I just successsfully migrated from a 5.2 installation to a 6.2.

1) I installed the admin_tree_structure extension, and I guess (since 
I've not found its usage guidelines) by simply declaring a page Archive 
its children should automagically become organized in a tree-like 
fashion. Unfortunately I got the following error: 
http://pastie.caboo.se/104459 . Any ideas?

2) With the new 6.2 (gem) installation, regardless of the presence of 
the admin_tree_structure extension,  the admin tree, after I edit a 
page, whenever I save it and the system brings me back to the main admin 
page, the admin tree doesn't stay expanded but become compressed into 
just one line. This is very inconvienient snce I've to click and click 
to expand it again and reach the page I was editing or a sibling of it. 
Is this a known bug of this release?

Many thanks for shedding some light on these issues.

Best regards,

Luigi