hmmm.... just saw this post...
running 1.9 freeloader version
started Iconx (crashed thrice - had it set to huge and forgot about the 50 some odd items I had dropped on my desktop since the last time I ran it)
cleared up my desktop, cleared the IconX cache, restarted it
OD set to 'keep in background when not in use'
seemed to work, then I tried:
click a blank space on objectdock and right click now without selecting anything just click out of the window and bingo, everything is gone
and bam! OD disappeared.
but, it was still there. it went into auto hide mode even though my configuration were unchanged. I put my mouse up, OD pops down.
so, now I got FF reduced to just under OD
I do the right click trick again and both OD and FF are gone.
OD is autohid again and FF is invisible. doesn't seem to be minimized, if i right click the taskbar icon it come right back up.. same if i restore anything else then re minimize it (used Opera), so as I minimize - FF is back.