[Orca-dev] idle cpu blank graph

[epc002]

environment:
SE 3.2.1, orca-0.27b2, orcallator.se & cfg 1.32
compiled with gcc2.95.3 on Solaris 8, 64 bit, Sun blade 1000, 
with ActivePerl-5.6.1.631.
target systems are Sun ultra 60's and Sunblade 1000's,
mix of sol2.6 & sol8.

Interesting observation: occasionally, on systems with 
significant idle cpu, cpu usage graphs will have 
blank bands in the plot.

Examining the raw data recorded by SE/orcallator.se, it
appears the idle cpu% is sometimes shown as exceeding 100%.
101.5, 100.8, values like that. Apparently the default 
orca config declares this as "unknown" and plots nothing.

One workaround is to modify the orcallator.cfg file so that:

data                    idle%
is changed to
data                    1 * ( idle% )

and 

data_max                100
is deleted entirely.

curious that the "1 * ( idle% ) is needed.
a bug or a feature?