I think I made some further step in putting this bug in the corner.
People who code EVOX can have a look and probably find it.
I invested a couple of hours and more than 50 (warm) reboots of my X, plus 3 beers and a good cigar.
I just used a "brutal" approach: testing and testing.
Here my findings:
You all already suspected "blackbolt_elite". I picked up also another skin which could make my tests less annoying: "AssPaper2".
1) Each of them work perfectly, if they are alone into the 'skin' Dir.
2) If they are together, only two skins into the Dir, there are two cases:
-a- if 'blackbolt' has been loaded into the Dir first, then there are no problems.
-b- if 'AssPaper2' has been loaded first, then it won't work.
3) If you want to make them work together, even if loaded into the Dir in the wrong order ... cancel the first comment line into skin.ini of 'blackbolt' (= "# Designed from http://www.xbox.com's
4) Well, in reality you can just move that comment line at the beginning of the file: it looks like EVOX doesn't like comment lines between "SkinName" and "[Skin_Bb Elite]".
At least this works for me and my dozen of selected skins ("AssPaper2", which I loved and thank, doesn't belong to my official collection).
Hope this helps.
5101, 4920 (1012A700), PAL, Region 04, Focus chip, most likely 1.4 (never
UDE1 (plus 4x s.xtf), EVOX, 1.00.5838.01, Maxtor disk 6Y080L0, FTP via mapped
drive in WXP (the fastest way for me, 10+MB/sec upload to XBOX)
XBMP 2.4+ (RelaX 0.75), LAN 100Mbs