Due to a packaging error, the version of LyX 2.3.0 installed by the '004' installer will not preview jpg or tiff files. An updated installer has therefore been uploaded. Users who want or need such previews can either install the new version or follow the instructions from this bug report:
https://www.lyx.org/trac/ticket/11186#comment:17 Thanks to everyone who worked to correct this problem.
