Enrico Forestieri wrote:
This has bitten me with dvipng. It was not working and I removed it. But I still could not instant-preview because png format was still requested and it was not recognized by the legacy python script. So I patched it to also deal with png images.
For information: This dvipng bug has been fixed and the MiKTeX developer will provide a new compiled version together with the upcoming MiKTeX 2.5. For the meantime LyXWinInstaller deletes the dvipng.exe from your MiKTeX system. This doesn't harm because it's not used by other programs. As LyX couldn't find the dvipng.exe, it uses the well working lyxpreview2ppm.py script like in LyX 1.3.x.
regards Uwe