I tweaked a little more my status bar to get the most informations out of it, and displayed correctly.
I finally ended up with this code:
{rtree}
{h!L}{i:file}<#FF0000><b> {hiL} cachés</b></#>{h!L}
{i:dir}<#000000><b> {sdL}/{tdL}</b></#>
{i:.txt}<#000000><b> {sfL}/{tfL}</b></#>
{width100}{bg+v=sbL/tbL,f=3,g=2,t=no,c1=#00ff00,w=100} {sbLa} / {tbLa}
{width107}{bg+v=sbL/700m,c=#8eb2e4,c3=#FF0000,w=50,f=2,l=0}{bg+v=sbL/4.7g,c=#8eb2e4,c3=#FF0000,w=50,f=2,l=0}{bg+v=sbL/dfR,c=#8eb2e4,c3=#FF0000,w=101,f=2,l=1}
{width135}{bg+v=duL/dtL,f=3,g=2,t=no,c1=#00ff00,c2=#ff0000,w=135} {dletL} {puL}% plein, {dfL} libre
{h!L}{bg+v=smp3L/tmp3L,f=3,g=2,t=no,c1=#00ff00}{h!L}{h!L} <i>{smp3L}</i> /{h!L}{h!L}<i>{tmp3L}</i> {i:.mp3}{h!L}{rleft}
{rtree2}
{h!R}{i:file}<#FF0000><b> {hiR} cachés</b></#>{h!R}
{i:dir}<#000000><b> {sdR}/{tdR}</b></#>
{i:.txt}<#000000><b> {sfR}/{tfR}</b></#>
{width100}{bg+v=sbR/tbR,f=3,g=2,t=no,c1=#00ff00,w=100} {sbRa} / {tbRa}
{width107}{bg+v=sbR/700m,c=#8eb2e4,c3=#FF0000,w=50,f=2,l=0}{bg+v=sbR/4.7g,c=#8eb2e4,c3=#FF0000,w=50,f=2,l=0}{bg+v=sbR/dfL,c=#8eb2e4,c3=#FF0000,w=101,f=2,l=1}
{width135}{bg+v=duR/dtR,f=3,g=2,t=no,c1=#00ff00,c2=#ff0000,w=135} {dletR} {puR}% plein, {dfR} libre
{h!R}{bg+v=smp3R/tmp3R,f=3,g=2,t=no,c1=#00ff00}{h!R}{h!R} <i>{smp3R}</i> /{h!R}{h!R}<i>{tmp3R}</i> {i:.mp3}{h!R}
I fixed some width to be sure that the graphics are showing good proportion with the text on top of them, but maybe I could remove the widths at the beginning of the lines.
Anyways, this is not the problem.
The status bar has strange behaviours when toggling the tree view and also the hidden files display.
The problems are mostly on the right pane. It happens that hidden files are not always shown (unless the tree is displayed) + when switching back hidden files view, a part of the right status bar is still used, but showing nothing.
Is it some kind of bug, or am I doing something wrong?
Just to let you get the picture, I would like both parts of the status bar to display the same informations. I don't want stuff under the tree (as I turn it on only when I want to get the right folder, then I switch it off) to be displayed. I also want to have the informations to be displayed aligned at the left border of the listers (and cut at the right border if there's too much infos to display. I don't want it to be extended under the second lister).