Seems to be working fine - at least, no error messages or anything. I disabled the old version (1.8 something), deleted the plugin folder, uploaded the new version, hit refresh on the plugins page, and enabled the new version (1.9b). All my exif settings and custom views were intact. I am using a customized version of the Autofocus theme.
Thanks so much for adding the 'make post date the same as exif date' feature!!! This saves me a huge amount of time. Now I just process the photos on my computer, batch upload, and I'm done, instead of having to manually enter all of the dates.
Maybe someone who uses the more advanced features of PhotoQ will be able to chime in on how those are working...
Also, I should add that I am already running PHP5. If you have 1and1 hosting (like I do) you will have to manually enable PHP5 in your .htaccess file - google will tell you how. Also the IPTC metadata seems to be working fine - I have some new options in my exif settings...