Some webdriver failed due to random bug on driver.version unknown

Stacktrace

org.openqa.selenium.TimeoutException: not loaded: tabsBar
Build info: version: '2.45.0', revision: '5017cb8e7ca8e37638dc3091b2440b90a1d8686f', time: '2015-02-27 09:10:26'
System info: host: 'oldjoyeux', ip: '10.213.0.35', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-74-generic', java.version: '1.8.0_60'
Driver info: driver.version: unknown
	at org.openqa.selenium.support.ui.FluentWait.timeoutException(FluentWait.java:259)
	at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:228)
	at org.nuxeo.functionaltests.AbstractTest.fillElement(AbstractTest.java:626)
	at org.nuxeo.functionaltests.AbstractTest.asPage(AbstractTest.java:584)
	at org.nuxeo.functionaltests.pages.AbstractPage.asPage(AbstractPage.java:70)
	at org.nuxeo.functionaltests.pages.LoginPage.login(LoginPage.java:127)
	at org.nuxeo.functionaltests.AbstractTest.login(AbstractTest.java:728)
	at org.nuxeo.ftest.cap.ITUsersTest.userCanChangeItsOwnPassword(ITUsersTest.java:88)
Standard Output

11:35:31,944 ERROR [AbstractTest] Test 'org.nuxeo.ftest.cap.ITUsersTest#userCanChangeItsOwnPassword' failed
org.openqa.selenium.TimeoutException: not loaded: tabsBar
Build info: version: '2.45.0', revision: '5017cb8e7ca8e37638dc3091b2440b90a1d8686f', time: '2015-02-27 09:10:26'
System info: host: 'oldjoyeux', ip: '10.213.0.35', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-74-generic', java.version: '1.8.0_60'
Driver info: driver.version: unknown
	at org.nuxeo.functionaltests.AbstractTest.fillElement(AbstractTest.java:638)
	at org.nuxeo.functionaltests.AbstractTest.asPage(AbstractTest.java:584)
	at org.nuxeo.functionaltests.pages.AbstractPage.asPage(AbstractPage.java:70)
	at org.nuxeo.functionaltests.pages.LoginPage.login(LoginPage.java:127)
	at org.nuxeo.functionaltests.AbstractTest.login(AbstractTest.java:728)
	at org.nuxeo.ftest.cap.ITUsersTest.userCanChangeItsOwnPassword(ITUsersTest.java:88)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$15.evaluate(FeaturesRunner.java:467)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$BeforeMethodRunStatement.evaluate(FeaturesRunner.java:346)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$BeforeSetupStatement.evaluate(FeaturesRunner.java:362)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$AfterMethodRunStatement.evaluate(FeaturesRunner.java:393)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$AfterTeardownStatement.evaluate(FeaturesRunner.java:412)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$RulesFactory$1.evaluate(FeaturesRunner.java:525)
	at org.nuxeo.functionaltests.LogTestWatchman$1.evaluate(LogTestWatchman.java:96)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$AfterClassStatement.evaluate(FeaturesRunner.java:285)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$RulesFactory$1.evaluate(FeaturesRunner.java:525)
	at org.nuxeo.runtime.test.runner.FeaturesRunner$BeforeClassStatement.evaluate(FeaturesRunner.java:268)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runners.Suite.runChild(Suite.java:127)
	at org.junit.runners.Suite.runChild(Suite.java:26)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:113)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:85)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:54)
	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:134)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)
Caused by: org.openqa.selenium.TimeoutException: Timed out after 30 seconds waiting for org.nuxeo.functionaltests.AbstractTest$1@4faf104
Build info: version: '2.45.0', revision: '5017cb8e7ca8e37638dc3091b2440b90a1d8686f', time: '2015-02-27 09:10:26'
System info: host: 'oldjoyeux', ip: '10.213.0.35', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-74-generic', java.version: '1.8.0_60'
Driver info: driver.version: unknown
	at org.openqa.selenium.support.ui.FluentWait.timeoutException(FluentWait.java:259)
	at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:228)
	at org.nuxeo.functionaltests.AbstractTest.fillElement(AbstractTest.java:626)
	... 54 more