Summary shows wrong maximum

Hi all,
I have a list with a numerical column "cum_hardreuses". By coincidence I  
discovered this:

max(libs[,"cum_hardreuses"])

[1] 1793

summary(libs[,"cum_hardreuses"])

Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
       1       2       4      36      14    1790

(note the max value of 1790) Ouch this is bad! Anything I can do to remedy  
this? Known bug?

This is a Version 1.16 (3198) of the MacOSX R.

Regards,
Sebastian Spaeth