padding before note with accidental at beginning of standard measures

[Kieren Richard MacMillan]

[ Lilypond 2.8 ]

Hello, all --

The default spacing of (i.e., padding before) notes which begin a  
measure and which have an accidental is, to my eye, wonderful -- but  
only as long as the measure begins a system, or the note is preceded  
by "something special" (e.g., time signature, key signature, clef,  
etc.). When the note is in a "normal" measure, I find the padding to  
be insufficient.

Is there any easy way to tweak the spacing of *just* the notes which  
begin a measure and have an accidental on them, but the measure does  
not have anything else special about it? (I don't even mind tweaking  
every such note/measure manually, as long as the tweak placed in one  
Voice/Staff is carried down through the rest of the Voices/Staves  
automatically.)

Thanks,
Kieren.

p.s. I've attached two screenshots, one showing a "good" spacing  
(with time signature change):

and one showing bad spacings (two "non-special" measures in a row in  
the upper part):