Unable to change Subversion Setting

I'm seeing the same issue. It seems like a bug. I get the following stack track whenever I open the SVN options for the first time after starting RM. Could you check if you get the same stack trace?

Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)
[1501018]  ERROR - plication.impl.ApplicationImpl - java.lang.Long cannot be cast to java.lang.Double 
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.Double
    at java.lang.Double.compareTo(Double.java:32)
    at javax.swing.SpinnerNumberModel.incrValue(SpinnerNumberModel.java:332)
    at javax.swing.SpinnerNumberModel.getPreviousValue(SpinnerNumberModel.java:371)
    at javax.swing.plaf.basic.BasicSpinnerUI.updateEnabledState(BasicSpinnerUI.java:489)
    at javax.swing.plaf.basic.BasicSpinnerUI.updateEnabledState(BasicSpinnerUI.java:470)
    at javax.swing.plaf.basic.BasicSpinnerUI.access$200(BasicSpinnerUI.java:33)
    at javax.swing.plaf.basic.BasicSpinnerUI$Handler.stateChanged(BasicSpinnerUI.java:1047)
    at javax.swing.JSpinner.fireStateChanged(JSpinner.java:434)
    at javax.swing.JSpinner$ModelListener.stateChanged(JSpinner.java:361)
    at javax.swing.AbstractSpinnerModel.fireStateChanged(AbstractSpinnerModel.java:102)
    at javax.swing.SpinnerNumberModel.setValue(SpinnerNumberModel.java:430)
    at javax.swing.JSpinner.setValue(JSpinner.java:329)
    at org.jetbrains.idea.svn.SvnConfigurable.reset(SvnConfigurable.java:256)
    at com.intellij.openapi.vcs.configurable.VcsManagerConfigurable$4.reset(VcsManagerConfigurable.java:214)
    at com.intellij.openapi.options.newEditor.OptionsEditor.b(OptionsEditor.java:400)
    at com.intellij.openapi.options.newEditor.OptionsEditor.access$2200(OptionsEditor.java:66)
    at com.intellij.openapi.options.newEditor.OptionsEditor$6$1$1.run(OptionsEditor.java:368)
    at com.intellij.openapi.application.impl.ApplicationImpl.runEdtSafeAction(ApplicationImpl.java:971)
    at com.intellij.openapi.options.newEditor.OptionsEditor$6$1.run(OptionsEditor.java:362)
    at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:774)
    at com.intellij.openapi.options.newEditor.OptionsEditor$6.run(OptionsEditor.java:360)
    at com.intellij.openapi.application.impl.ApplicationImpl$6.run(ApplicationImpl.java:375)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)
    at com.intellij.openapi.application.impl.ApplicationImpl$1$1.run(ApplicationImpl.java:130)
[1501020]  ERROR - plication.impl.ApplicationImpl - JetBrains RubyMine 3.2.3  Build #RM-107.494 
[1501020]  ERROR - plication.impl.ApplicationImpl - JDK: 1.6.0_26 
[1501020]  ERROR - plication.impl.ApplicationImpl - VM: Java HotSpot(TM) 64-Bit Server VM 
[1501021]  ERROR - plication.impl.ApplicationImpl - Vendor: Sun Microsystems Inc. 
[1501021]  ERROR - plication.impl.ApplicationImpl - OS: Linux 
[1501021]  ERROR - plication.impl.ApplicationImpl - Last Action: ShowSettings

I opened a ticket at

http://youtrack.jetbrains.net/issue/RUBY-9282

Add your info there if it matches, please :)