Hi,
in case it helps...
I have the u-boot 4.27 with the pingto patch and squeeze in NAND (ubifs) and on SD (ext2/3) - kernel is 2.6.38.8.
After having suffered with the DENX u-boot and the 3.0 Kernels...don't know why...
I found this:
http://www.technolust.de/?p=70&lang=en

so my environment is showing these settings. Take care when you copy and paste from the web page; the high commas and the 'x' in the addresses may casue some trouble on the plug - so either type on your own or use an editor to replace the highcommas and the 'x'es.

Much fun & success!
Y.

glad to read that your environment is running on all 6 cylinders again!
At least I thank you for your support! - Very much appreciated!
Y.

@ iffypug: just to let you know, that I ran in the same php problem and after loosing my last hairs the last 2 days I found your message here - thanks! Editing the runme.php made it run under Debian Squeeze.

if I remember right I encountered something similar; I fixed it by copying the tar into the root where the decompressed files have to reside (UBS or SD) and extracted the tar then there. I hope this helps - I'm unfortunately far away from my plug and my notes...

Slava! - you my hero of the day! your procedure worked for me using Win 7 - after I fiddled around with Ubuntu and Debian - and I thought I bricked the plug totally!
thank you so much!
Greeteing from a linux newbie!