ClipCache sometimes stops capturing clips for no apparent reason, why?
ClipCache relies on something called a clipboard viewer chain. Any program that monitors the clipboard is linked into the chain – for example, download url monitors etc.. Unfortunately the design of the chain (by Microsoft) means that one badly written program can prevent other programs (i.e. ClipCache) from being notified about new data copied to the clipboard. ClipCache has a “Repair Clipboard Chain” in the Tools menu. However, this is a cure rather than a preventative measure, so another program may “break” the chain at a later time. I would recommend that you try to identify when ClipCache stops capturing, and note the actions (i.e. loading a program, or performing a particular operation) leading up to the failure. This may be the culprit.
