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Product Version: NetBeans IDE 7.0 (Build 201104080000) Java: 1.6.0_24; Java HotSpot(TM) 64-Bit Server VM 19.1-b02 System: Windows 7 version 6.1 running on amd64; Cp1252; fi_FI (nb) Steps: 1. have such a long list of source roots that they don't all fit into to the source roots window (i.e. scrolling is required) 2. scroll down a bit 3. start disabling/enabling source roots => after two clicks the window refreshes and you're taken to the beginning of the list again May sound like a minor issue but believe me it's very annoying in practice; just try disabling a dozen source roots that are in the middle of a long list.
It looks like this is fixed in recent dev builds. It might be fixed by batch processing of changes introduced by http://hg.netbeans.org/main/rev/a130b52ac3d2