This looked like a good place to post on the problem I am currently experiencing. This is on a Windows Vista machine that has benefited from CHS for a little over 2 years. No recent changes come to mind for me--no new installations, no recent Windows updates, etc.
CHS appears to launch at start-up fine, with icon displayed as usual in the system tray. However, no key combinations activate functions of CHS and the tray icon (while displaying the correct mouse-over reminders) is not useful to access the application: nothing opens upon any click.
Although I haven't bothered to check in the past, now I notice that CHS is using about 50% of system CPU (Intel Core Duo @ 2 GHz) and 6.5 M of memory. Like for Ken, from April 2009, I cannot close CHS from within the application, but have to kill the process. If I relaunch from the Start Menu folder, the same behavior is seen.
I did uninstall, download the currently-available version (listed as 1.27.01), and try again, with the same results. (I use DcUpdater, so I probably had the same version before uninstalling.)
I haven't noticed any other application behaving strangely.
Let me know if you have any suggestions, or if you know of a thread elsewhere I should follow.