[Therion] xTherion will not open JPG backgrounds

[Bill Gee]

Dang it ...  I remember seeing this problem some months ago, probably in 
June, but now cannot remember how I fixed it.

Therion 6.3.4+dev running on Fedora 43.

In late December I worked on a cave map and had no problems with it. 
xTherion opened jpg files as backgrounds.  Today I went back to that 
same map, and it will not load the background jpg files.  It will open 
png backgrounds.  The only error I can see is in the Background Images 
field.  It shows the name of the jpg file and adds "(unknown)" at the end.

I checked both tkimg and libjpeg.  They are installed.  What else is 
required for this to work?

I started xtherion from a command shell.  There were no additional error 
messages.  Is there a log file somewhere that might give more clues?

In early January I ran the usual update process for all packages.  Both 
tkimg and libjpeg were updated.  I don't see anything that was removed 
other than old kernels.

Thanks!

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Bill Gee