Rapidshare changed the error message when a download from the current IP address is already in progress. It used to be "You need RapidPro to download more files from your IP address.", now a (random?) alphanumeric string is appended, e.g. "You need RapidPro to download more files from your IP address. (8d5611a9)". JD does not recognize this message, therefore it results in a fatal instead of a temporary error and the file has to be reset manually.