@cybmole - you will get abuse if you make silly statements like that. Kovid can't replicate it, you can't fix what you can't replicate. It only happens on a minority of users systems, it certainly doesn't happen on mine.
If you *really* want the problem fixed, then just make the effort yourself to figure out what causes it. Its not rocket science, but it can be time consuming - and why should Kovid waste his previous time trying to guess if users aren't prepared to help themselves?
You don't have to be a software developer to do it. For instance try the following:
- Put a clean install of calibre on a completely clean alternative machine - change no settings from defaults, and start with a simple library. Verify that it does or does not happen.
- Start Windows in safe mode. And/or disable various other services on your machine/at startup
- If you don't have a spare machine, install a virtual machine with a fresh Windows install
- Make a backup of your calibre configuration directory, then delete it so calibre is forced back to system defaults
- Incrementally step by step turn on features or other software services until you start seeing the problem again. Then go back a step to verify that is indeed the cause.