@ Canar's "niticks":
Pref
02: IHMO it's logical enough. Writing to disks or discs...

05: I meant highlighting. For example, you could change their style, font color, background and so on. For example, tiled background (i.e. white-blue-white) is often used in pricelists and long tables. It highly increases redability of text.
06: that HIGHLY depends on implementation.
07. OK, but integration of keyboard shortcuts to menu is left then. OK.
10. Well, tastes differ. Actually this won't play a big role anyway. Besides, there are some anti-Winamp folks and such a scheme could remind them their "favorite" player

GUI
01. hm... I think, it should be. Surely, your variant is even better.
@Anza: I was surprised too. I thought of including it to my wishlist,b ut checked first. Now I can operate Foobar with simple shortcuts. Thanks to Peter

But... did we miss anything? I can't recall this feature in whatsnew list...
@picmixer
I'm afraid you haven't read this thread

I'm talking about "usability", which has very few in common with "power". You mix things.
@killmaster: interesting suggestions.
Preferences:
11: Create standalone HELP menu item with About and links to help, FAQ and tutorials. It's very common in modern applications.
12: Rearrange menu item's view (one possible solution is given by killmaster).
Actually I don't think, that Tree would be great there, but menu representation definitely needs to be changed.
I have one more possible solution: this menu recreates real menu with its current items and items can be easily removed/added by keys or dragon drop. IMHO it's the most intuitive solution, which allows aranging menu in the most efficient way. The only serious problem here is that its imlementation would require some efforts.
@Moneo.
"Well, tagz library isn't meant for complex code."
That's what I told you

But people trend to create more and more complex strings, where spaces and tabs are needful much less often, than more "serious" tags. Let's take a look at my basic Status string as example. I'll highlight all spaces in tabs by uppercase letters.
$if2($upper($info(codec)),$upper($ext(%_filename_ext%)))
[#SPACE#%__bitrate_dynamic% kbps#SPACE#]
[#SPACE#'('T%__replaygain_track_gain%')']
['('A%__replaygain_album_gain%')']
$if(%__channels%,
$ifgreater(%__channels%,2,%__channels%ch,
$ifgreater(%__channels%,1,stereo,mono))#SPACE#,)[%__extrainfo%]#SPACE#
$select($add($mod(%_time_elapsed_seconds%,4),1),'--','\','|','/') '['$progress2(%_time_elapsed_seconds%,%_time_total_seconds%,15,'?','?')']'#SPACE#<> %_time_elapsed%[#SPACE#/#SPACE#%_time_total%]
Now let's calculate our "neospace" tags: only 6 spaces in 10 strings of text. So are these damned 6 spaces worthy to sacrifice hardly readable text?
You're a kind of mathematician, try to calculate a number of spaces and tabs even in the most complicated TAGz and then think if they really worth that much.
"What if id3v2 component isn't installed?"
Then there'll be no button

"You probably mean highlighting, not underlining.
And that would be a) nonstandard an b) ugly."
Forgive me my English...
Take a look at two excel coluns. One of them is monotonous and another has every second item's background slightly highlighted. And the third colunt has no cells-separators at all. It looks like rows, typed on a piece of paper. Where can you find needful value faster?
As for my GUI 04 wish, I'd liked to send you downloading one program, called ArtIcons pro (www.aha-soft.ru). I used to create graphics for it and I bet, that by looking at its menu you'll understand what i meant here. OK?