The bug was checked.
Thank you for your kind.
I think the ploblem is fixed below style.rules
add to grids.css
/* Layout broken when body font size change Fix */
.yui-t1 .yui-b{
max-width:162px;
}
.yui-t1 #yui-main .yui-b{
margin-left:173px;
}
.yui-t2 .yui-b{
max-width:182px;
}
.yui-t2 #yui-main .yui-b{
margin-left:193px;
}
.yui-t3 .yui-b{
max-width:302px;
}
.yui-t3 #yui-main .yui-b{
margin-left:313px;
}
.yui-t4 .yui-b{
max-width:182px;
}
.yui-t4 #yui-main .yui-b{
margin-right:193px;
}
.yui-t5 .yui-b{
max-width:242px;
}
.yui-t5 #yui-main .yui-b{
margin-right:253px;
}
.yui-t6 .yui-b{
max-width:302px;
}
.yui-t6 #yui-main .yui-b{
max-width:100%;
margin-right:313px;
}
.yui-t1 #yui-main .yui-b,
.yui-t2 #yui-main .yui-b,
.yui-t3 #yui-main .yui-b,
.yui-t4 #yui-main .yui-b,
.yui-t5 #yui-main .yui-b,
.yui-t6 #yui-main .yui-b{
max-width:100%;
}
I am glad when your opinion can be heard.
Thank you