Apparently LastRSS doesn't parse feeds which are gzip compressed; and at least one RSS server isn't getting the message that LeafRSS can't use a gzipped feed.
I'm giving this issue low priority since I've only encountered the problem on one out of 860 feeds. It's mainly just to make a record that a problem (apparently) exists.
The feed at issue is at the following URL:
http://washingtontimes.com/weblogs/feeds/entries/inside-outside/
Trying to figure out what was happening was puzzling at first, since Firefox transparently unzips feeds when they are gzipped. I found what was happening when I used Lynx on the web server to view the feed. Instead of displaying the feed text, Lynx downloaded and saved a gzipped binary file.
Magpie claims to be able to unzip gzipped RSS feeds; although I wouldn't want to go back to using Magpie just to solve this problem. Perhaps the unzipping code in Magpie could be reused in LastRSS.