min and max function in time data type columns

Peter Boda (plboda@yahoo.com) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
min and max function in time data type columns

Long Description
If  I try to select a min or max value from a column of time data type, I get the message "Unable to select an
aggregatefunction min(time)" 
In any other data type columns, min and max works ok.
My database version is 6.5.3
Can somebody give me an idea what is going on?

Sample Code


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