[pstricks] logLines and ticklines

[jmpapy]

Hello,

when using the x or y-axis logarithmic scale (i.e. by setting 
ylogBase=10 for instance), it is possible to draw 5 lines per decades by 
also specifying logLines=y. 

1. I wonder whether there is a way to modify this line density 
(10/decades, 20/decades...) 

2. If I also want to draw the x lines (on the same graph), I write 
ticklines=x.  But unfortunately, the x-lines are shifted to the bottom 
and...overlap my caption text. Where does this offset come from ? 

thx,

JM
 ps: my version of the pstricks package is one of the latest.