some partitions appear with questionmark icon

Same thing on Fresh Natty alpha2 64 bits : 2 of my 3 internal HDD drives (the 2 ones where Ubuntu OS is not installed and have only one full partition) appear in left dock with gray "?" icon.

I do not need these icons, as I have the Place menu to put my favorite folders, it takes part of the dock where I prefer put applications icons.

Is there a way to remove them from dock, I didn't find how for the moment (this is not a bug, more a wishlist feature) ?

There is Bug #711671 too; which is also about the '?' icon, but about mounted partitions.
If we are not differentiating mounted/unmounted icons, we could dup it to this bug.

I'm now trying to fix this bug on my spare time.
I'm getting familiar with the necessary APIs.

I can't run Unity to test my code.
I don't understand why is it so difficult to test this.
I followed the instruction in the INSTALL file but I'm not able to start Unity.

This bug was fixed in the package unity - 3.4.6-0ubuntu1

---------------
unity (3.4.6-0ubuntu1) natty; urgency=low

  * New upstream release.
    - dash times out (LP: #662618)
    - possible memory leak in compiz when using places, dashboard
      (LP:#720446)
    - compiz crashed with SIGSEGV in IconTexture::~IconTexture() (LP: #721907)
    - dash - search string not always taken into account (LP: #701569)
    - Unity allows you to Quit itself (LP: #705536)
    - invisible window border problems (LP: #710271)
    - Slowliness in the file places (LP: #710791)
    - add super shortcuts to the launcher - logic (LP: #721264)
    - key navigation doesn't activate trash, keys, expo or places
      (LP:#723141)
    - Super-shortcuts for apps, files, and workspace switcher (LP: #617356)
    - New launcher tile super key overlay aesthetic (LP: #646712)
    - add cursor-key navigation to quicklists (LP: #701543)
    - Super key should open Dash (LP: #706713)
    - Dash view should use "Prefferred Applications" icons where appropriate
      (LP: #708479)
    - some partitions appear with questionmark icon (LP: #710809)
    - Unity wrongly resizes thumbnails after first opening of Files place
      (LP:#721123)
    - Change the fading and showing curve effect when hovering the bfb
      (LP:#721125)
    - Recent files appear duplicated in the Dash (LP: #646758)
    - All Applications tab only shows first 100 applications (LP: #660979)
    - slide animation typo in unity configuration (LP: #723354)
    - Place icons should be in their respective packages (LP: #672447)
    - Trash right click menu is positioned incorrectly (LP: #718880)
    - Require to use gconf to check on unity and the panel-service if the
      accessibility should be enabled (LP: #723699)
  * debian/control:
    - dep on latest nux
 -- Didier Roche <email address hidden> Thu, 24 Feb 2011 20:16:29 +0100