Well, the technote I found covers a bunch of PCF related issues and does not indicate a specific version, so it's hard to say exactly when we changed it from freezing, to giving a nice warning with details. Dkirkma indicated SS3 gave a warning message so 9.5.1.2 (aka SELECTseries 4) should also have it. I suppose a better solution would be to convert or merge the overlapping components, but that would be a lot more difficult.
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