One of my computer has the issue with eclipse and android SDK.
Every time I clicks "Run" or "Debug", then the eclipse will open up a new android instance instead of refresh the app in the "opened" one.
In the meantime, the console prints
[2011-09-02 16:46:13 - Emulator] WARNING: Data partition already in use.
Changes will not persist!
[2011-09-02 16:46:13 - Emulator] WARNING: Cache partition already in use.
Changes will not persist!
I have restarted my computer and the problem still there.
P.S. I have never get android properly working on this computer, but I have set another three laptops working well. They are all windows7 64bit machines.
Thank you.