Oh dear. Same here, thoughout. That means the Gremlins are doing it. I HATE that.
...hang on, Jarte does clipboard monitoring. I wonder if it's that that's interfering... but then, it'd probably cause CHS to have problems, and it doesn't.-oblivion
Depending on your OS, maybe you had a Clipboard Chain Break? Both ArsClip and CHS have ways of detecting that. E.g., ArsClip Web Help:
Automatic clipboard chain break detection
UPDATE: Vista users can and should disable chain break detection, since
breaks are no longer present on the Vista operating system.
Unfortunately, any program can mess up the "clipboard chain", because it is
left up to the program to correctly handle clipboard messages. ArsClip has
a workaround for this. It checks the contents of the clipboard every 1
minute to make sure that it was automatically notified of the current items
arrival. If it wasn't, it will display an error message, and then
transparently fix any future problems this session without bugging you.
It's possible that either ArsClip or CHS had fixed things when you tried again.
People want something that can knit, bake a good rice pudding and cycle up the curtains as well as put words on paper, it seems.
Souns like you're British

If you're old enough to remember Fidonet, the standing joke about
Terminate was the forthcoming dishwasher interface...
(1989 might have been my first DTP package. That makes me feel suddenly very old.)
So you
are old enough

Remember GEM?

I still want to make CHS work better for me, because I'm arrogant enough to believe that if it works better for me, it'll work better for everyone else too.
Welcome to the Moderately Honourable Brotherhood of Beta Testers, Suggestion Makers and Software Pesterers

Going back to
longish words I knew I was going to be typing repeatedly -- and set a shortcut up to bring up favourites to make them easier to get at quickly.
If you don't want to use one of the text expanders, you might like to look at two freeware hotkey programs,
HotKeyz and
HotKeyP. Both allow you to set just one hotkey which will pop up a menu of texts, or in HotKeyz case, other things as well. The images are first, HotKeyP, and second, HotKeyz.
Humph. Going too far off topic

Apologies, mouser.