Thought I'd share my experiences with the latest core preview.
For the first time I'm able to get an image at all over DVI, so that's good.
However, some graphical glitches appear on screen within 30-60 seconds from power-on. They are visible mainly on the right click menus. It happens on both PAL and NTSC screenmodes, interlaced and non-interlaced. Reboot and all is fine for another 30-60 seconds. A reflash of the (same) core also made the glitches go away briefly. These glitches are only visible through the Indivision, native video is fine. Tried another monitor aswell with the same result.
Also, I can't get the XTREME screenmode to work. What happens is the monitor acts like it did with all screenmodes on the previous cores; The little OSD box that tells me I'm on the digital/DVI input keeps flashing on and off (not the out of sync-message). The monitor is a ViewSonic VP191b (1280x1024, 60Hz recommended).
On a brighter note I must also say I'm completely blown away by the image quality! Far better than my Indivision AGA mkI, and the scanline emulation looks very nice IMO.