What's the most most mysterious bug you've ever encountered that later turned out to have a trivial explanation?
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I suspect I’m not entering into the spirit of things but we were rolling out some business software to a global financial services institution that you have heard of, and after a certain amount of time one of the clients would stop working and it would spread to all the other
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Clients. The only way to fix it was rebooting the server - and the delay before it happened kept on getting smaller. We could not reproduce the error on our servers. We then found out that installing and uninstalling Microsoft office 1997 would fix it
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Servers that had office 97 installed and uninstalled on...
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