Why Are File Uploads Causing a '500 Error'?
A couple of times recently, I've been having trouble with file uploads to the server causing 500 Internal Server Errors. The first time it happened I solved the problem but forgot to keep a record of what it was that I'd done to fix it. So, when it happened again (tonight) I thought I'd make a note of the fix just in case it helps anyone else (or I need to remember it again in the future!)
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