Just FYI -- I'm a long time sysadmin that primarily uses Gentoo, and I use xxdiff dozens of times per day. The maintainers of Gentoo's package repo just recently declared that xxdiff is getting removed due to some long-standing technical difficiencies and a general state of abandonment. I came here hoping to find signs of life and perhaps gather evidence to argue for xxdiff's preservation in Gentoo, but I'm afraid that their appraisal is correct.
QT3 is dead, and the inability to correctly deal with unicode files has become too much of a burden to bear for a development task as critical as visual diff'ing.
I'm very sorry to see xxdiff fade away. It was a good run. :(
Here's the associated Gentoo bug: http://bugs.gentoo.org/show_bug.cgi?id=300216
I'm currently porting xxdiff to Qt4, first because I need it on OSX and Qt3 doesn't compile on Snow Leopard.
Hopefully, when I'm done (which will be soon), the author will import my changes into his reference code. If this doesn't happen, well, I'll make my code available anyway, but would not like it. I hate forks...
done -> xxdiff 4.0b1