TeamCity 8.1.2 Client Errors in Server Log

I've just upgraded to TC8.1.2, and saw that it updated our client-side tray icons.

But I'm seeing a bunch of these error messages in the server log:

Any ideas?

[2014-05-06 13:18:05,997]  ERROR -   jetbrains.buildServer.SERVER - Error java.lang.RuntimeException: The scope of the component class jetbrains.buildServer.server.rest.jersey.UrlBuilderProvider must be a singleton while processing request: GET '/guestAuth/app/rest/cctray/projects.xml', from client 10.24.53.42:49306, user-agent null, authenticated as special user 'guest' (Guest user) {id=-1000}
java.lang.RuntimeException: The scope of the component class jetbrains.buildServer.server.rest.jersey.UrlBuilderProvider must be a singleton
 at com.sun.jersey.core.spi.component.ioc.IoCProviderFactory.wrap(IoCProviderFactory.java:99)
 at com.sun.jersey.core.spi.component.ioc.IoCProviderFactory._getComponentProvider(IoCProviderFactory.java:90)
 at com.sun.jersey.core.spi.component.ProviderFactory.getComponentProvider(ProviderFactory.java:150)
 at com.sun.jersey.core.spi.component.ProviderFactory.getComponentProvider(ProviderFactory.java:128)
 at com.sun.jersey.core.spi.component.ProviderServices.getComponent(ProviderServices.java:233)
 at com.sun.jersey.core.spi.component.ProviderServices.getProvidersAndServices(ProviderServices.java:182)
 at com.sun.jersey.core.spi.factory.InjectableProviderFactory.configure(InjectableProviderFactory.java:104)
 at com.sun.jersey.server.impl.application.WebApplicationImpl.initiate(WebApplicationImpl.java:580)
 at jetbrains.buildServer.server.rest.jersey.JerseyWebComponent.initiate(JerseyWebComponent.java:43)
 at com.sun.jersey.spi.container.servlet.ServletContainer$InternalWebComponent.initiate(ServletContainer.java:253)
 at com.sun.jersey.spi.container.servlet.WebComponent.load(WebComponent.java:517)
 at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:199)
 at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:308)
 at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:642)
 at jetbrains.buildServer.server.rest.APIController.init(APIController.java:154)
 at jetbrains.buildServer.server.rest.APIController.ensureInitialized(APIController.java:293)
 at jetbrains.buildServer.server.rest.APIController.doHandle(APIController.java:203)
 at jetbrains.buildServer.controllers.BaseController.handleRequestInternal(BaseController.java:75)
 at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153)
 at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48)
 at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)
 at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)
 at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)
 at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:549)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
 at jetbrains.buildServer.maintenance.TeamCityDispatcherServlet.service(TeamCityDispatcherServlet.java:37)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at jetbrains.buildServer.web.ParametersProviderCalculationContextFilter.doFilter(ParametersProviderCalculationContextFilter.java:6)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at jetbrains.buildServer.web.DisableSessionIdFromUrlFilter.doFilter(DisableSessionIdFromUrlFilter.java:3)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at jetbrains.buildServer.web.DiagnosticFilter.doFilter(DiagnosticFilter.java:26)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
 at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
 at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
 at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
 at java.lang.Thread.run(Thread.java:744)