I was afraid this bug wasn't going to manifest itself again but, at last, it 
has.
As described above, the battery info and state are unreadable.  At this point, 
I have powered off the computer and removed/reseated the battery and powered it 
back on.  I also have rebooted several times.

As reported previously, If I reboot into OS X, that should put things
right, but I haven't done that yet, in case anyone monitoring this bug
would like me to post additional diagnostic details.

Below is the /proc/acpi/battery/BAT0/{info,state} while the bug is
manifesting:

info:
present:                 yes
design capacity:         0 mWh
last full capacity:      0 mWh
battery technology:      rechargeable
design voltage:          0 mV
design capacity warning: 250 mWh
design capacity low:     100 mWh
capacity granularity 1:  10 mWh
capacity granularity 2:  10 mWh
model number:            
serial number:           
battery type:            
OEM info:                

state:
present:                 yes
capacity state:          ok
charging state:          charging
present rate:            0 mW
remaining capacity:      0 mWh
present voltage:         0 mV

The proper battery info & state are posted in the original bug report.

I am on Ubuntu 8.04, up to date as of 2008-04-23
uname -a:
Linux tatooine 2.6.24-16-generic #1 SMP Thu Apr 10 13:23:42 UTC 2008 i686 
GNU/Linux

-- 
macbook battery info not readable, appears empty
https://bugs.launchpad.net/bugs/215074
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