Thanks to the username reshell, I discovered that, for certain technical reasons, the images in my journal are sometimes enormous and slow to load. It will be fixed by tonight.
This is what happens when one person who isn't too lazy comes along. Surely whole crowds of people noticed that the images were loading slowly, but no one thought to investigate and write to me. For me, of course, they load instantly despite their size – from the Latvian server where they are hosted, I get two megabytes per second.
People! Don't be lazy, make the world a better place :-)