Same issue here (9.04). Acroread upgrade failed, and a "partial dist-upgrade" failed over and over. I solved it by a "sudo apt-get remove acroread acroread-debian-files;sudo apt-get install acroread".
Not sure if it directly relates, but somewhere between the attempted partial dist-upgrade and the replacement of acroread, "libgl1-mesa-glx" and/or "libgl1-mesa-dri" were replaced by "libgl1-mesa-swx11". This was noticable in the visual effects; for example, window borders became black instead of transparent. I reinstalled "libgl1-mesa-glx" and "libgl1-mesa-dri" using synaptic which seem to have restored the visual effects.
Same issue here (9.04). Acroread upgrade failed, and a "partial dist-upgrade" failed over and over. I solved it by a "sudo apt-get remove acroread acroread- debian- files;sudo apt-get install acroread".
Not sure if it directly relates, but somewhere between the attempted partial dist-upgrade and the replacement of acroread, "libgl1-mesa-glx" and/or "libgl1-mesa-dri" were replaced by "libgl1- mesa-swx11" . This was noticable in the visual effects; for example, window borders became black instead of transparent. I reinstalled "libgl1-mesa-glx" and "libgl1-mesa-dri" using synaptic which seem to have restored the visual effects.