Yes, up/down is all I meant. I don't own a USB mouse, and the trackpad doesn't have a scroll area, so scrolling up and down is a bit fiddly.
Building it was surprisingly easy given I've never used svn before and have never built anything on Linux before (I have built non-autoconf code on Solaris in the distant past, and have built autoconf projects on Windows mind you). The instructions were all very clear and concise, so thanks to whoever put those together. Once I'd figured out to install the build-essentials package (thanks to rjek on c.s.a as it happens) it all worked first time (except for libharu*)
So thanks also to everyone on the Netsurf team for bringing the best browsing experience to every machine I use!
* The INSTALL file tells you to run the configure script (then make) but that doesn't exist. configure.in does and tells me to run buildconf.sh, but running that crashed since I didn't have aclocal installed. Installing automake fixed that, but buildconf still errors saying AC_PROG_LD and AM_PROG_LIBTOOL are undefined macros, and that's as far as I got. Thankfully libharu is optional, so I just unconfigured it and built netsurf fine at the first attempt.