Gantt chart Incompatibility with Firefox 24 and 25

I got it

This happens when the value in one of the columns is largest than the column itself.
To reproduce, I just entered 999999,99 days in the validated work field.
This produces the issue on FireFox and Chrome.

Surprisingly, IE display is still correct.
In fact, it is because IE font size is a bit smaller than other browsers.
Entering 9999999,99 days in the validated work field also displays the issue on IE

I'll look for a fix.

I think I have a workaround.

Try code in attached file :
- unzip and copy it into /view/js to replace existing one
- clean web cache
- test