[Proj] Lat-Long to Lambert Conformal Conic(2SP) transformation inaccuracy issue

[Tonu Lukk]

Hello all

I'm trying to convert between lag-long and Lambert Conformal Conic (2SP)  
projection.
The command line is:
proj +proj=lcc +lat_1=58N +lat_2=59d20'N +lat_0=57d31'03.19415"N  
+lon_0=24E +x_0=500000 +y_0=6375000 +ellps=WGS84 -r

The problem is that when I input the origin's coordinates,  
lat=57d31'03.19415"N lon=24E, I get x=500000 ja y=6375098.83, not x=500000  
y=6375000 as coordinate system's definition suggests - a 98.83m inaccuracy  
in northing value.
What I'm doing wrong?

Thanks in advance!

Tonu

PS:I'm using lib.proj-4.4.7.b precompiled binaries for windows.