hello,
by investigating my rgb led driver (http://www.midibox.org/forum/index.php/topic,14109.msg121450.html#new) I had a strange problem:
when I restart the core, leds part is ok (except my code problem… but I mean, some leds are as they must be) but my “pretty” LCD gives me a strange message:
ME5
>505$$ o7$$
and it seems I cannot upload anything 
does it happen in special conditions ? may I do a mistake?
is it a known behaviour?
now it is better (?)
MIOS V1.9f
(C) 2007 T.Klose
but core seems stuck.
I read about checking voltage, gnd etc. I did it. all is ok.
I read about core stuck.. it is impossible as I read.
I tried to “force” upload by restarting it and sending my .hex without waiting checksum confirmation… all the same.
it is stuck in this state.
strange.
a long time ago, I fixed all PSU problem.
it is very stable and reliable.
if someone gets an idea for me to test/try etc.
If I find a trick, I post here 
all is ok.
when it happens:
try to restart the core, upload a new code
etc etc
one time, it will happen !