Since the upgrade to moodle 1.7 the tex-filter doesn't works properly.
When I typef(x)=x+3 the result is f(x)=x+3
On this site I got
the permission was already 777.
After the upgrade I have also problems with the backslash. For other people aren't these problems new, but it's for me the first time that I recognise them. I made an upgrade from moodle 1.6 to moodle 1.7.