wei
Thanks a lot for the comment. I'll try to find a fix as soon as I can, but can't promise it'll be very soon.

Thanks for the comment. At first glance I don't know how to do it quickly. I'll try to figure it out a bit later.

I see that you left a similar comment on the script, which my script is based on. If the author of that script finds a solution, please let me know by commenting, and I'll be able to fix this script immediately.

Well, I've forgotten to mention in the description, that I always use "List mode" and didn't test the script in "Expanded mode". Thank you for pointing this out, I'll edit the description.

I've written a new script based on this one, which I consider a bit handier (at least to me). You can check it here:
Google Reader Background & Read@Lenny: thanks for the idea)

The script works great if I open the item ('o') then understand that it's worth reading and open it in a background tab by pressing 'Enter'. This also closes the item automatically, what is very handy.

But there is another pattern: I just look at the title of item and want to open it in background without expanding in reader. What should I do?
First variant: I press 'o' and then press Enter just like described before.
Second variant: I press Enter, the item is opening in background BUT it's also opening in reader! And I have to close it by pressing 'o'!

Could you please change this behaviour so that it would be as follows: if I press 'Enter' on unexpanded item, it opens in background and ~doesn't expand~.

Thanks in advance.

JohnM,
Very nice script, but could you add a keyboard shortcut for bookmarking? Just like 's' for starring, e.g. 'a' for bookmarking with default tags (without any additional popups).
Thanks in advance.