Kerbal Space Program

Overview:
If multiple science experiments have the same experiment ID in science defs config files when they are loaded it causes an error and stops any further experiments from being added.

Detail:
If there are experiments defined in an EXPERIMENT_DEFINITION node in a config file, when the first call is made to ResearchAndDevelopment.GetExperimentIDs(), or any other call that generates the experiments list in ResearchAndDevelopment, the following error is raised: ArgumentException: An element with the same key already exists in the dictionary.
This then causes the function to throw an exception and no further elements are added to the list. When any experiments are performed this throws an error, as the experiment id does not exist.
Two EXPERIMENT_DEFINITIONs with the same ID could happed if a user tries to make a backup of their ScienceDefs.cfg file in such a way that it is still loaded, by incorrectly installing mods or by two mods having the same ID.