stalonetray geometry height parameter strange behaviour

[Maxim Loparev]

According to the documentation
--geometry geometry_spec, geometry geometry_spec
           Set tray`s initial geometry to geometry_spec, specified in standard X notation: widthxheight[+x[+y]],
           where width and height are specified in icon slot multiples. Default value: 1x1+0-0.

But when i set it to:
5x1+100+100 i got single line of pixels string with no icons visible
5x2+100+100 i got 1 row of icons
5x3+100+100 i got 3 rows of icons

Not that i miss 2 rows tray too much, but it really annoys me, when i edit it's configuration.