Plugin Repository Macro seems to download major XML files at request-time if uncached

http://www.adaptavist.com/display/USERGUIDE/Confluence+Repository+Macros

From a superficial glance it seems that this macro (which is used on quite a few pages) is executed at request time and polls huge amounts of data (2MB XML) file. This has happened for example during a RSS feed request:

008-04-09 18:17:28,042 ERROR [resin-tcp-connection-j2ee.confluence.atlassian.com:8080-5143] [plugin.repository.plugin.RepositoryPluginMacro] execute com.atlassian.plugin.repository.model.RepositoryException: Error downloading: http://confluence.dev
eloper.atlassian.com/plugin-repository/proxy.action?decorator=none&buildNumber=-1&repoClientVer=2.0.13&os=amd64&javaVer=1.6.0_04&javaVendor=Sun+Microsystems+Inc.
The server confluence.developer.atlassian.com failed to respond with a valid HTTP response
– url: /spaces/createrssfeed.action | userName: anonymous | action: createrssfeed
com.atlassian.plugin.repository.model.RepositoryException: Error downloading: http://confluence.developer.atlassian.com/plugin-repository/proxy.action?decorator=none&buildNumber=-1&repoClientVer=2.0.13&os=amd64&javaVer=1.6.0_04&javaVendor=Sun+Micros
ystems+Inc.
The server confluence.developer.atlassian.com failed to respond with a valid HTTP response
at com.atlassian.plugin.repository.datasource.ProxyDataSource.getData(ProxyDataSource.java:187)
at com.atlassian.plugin.repository.datasource.ProxyDataSource.getAllPlugins(ProxyDataSource.java:267)
at com.atlassian.plugin.repository.plugin.RepositoryPluginMacro.execute(RepositoryPluginMacro.java:457)
at com.atlassian.renderer.v2.macro.ResourceAwareMacroDecorator.execute(ResourceAwareMacroDecorator.java:45)
at com.atlassian.renderer.v2.components.MacroRendererComponent.executeMacro(MacroRendererComponent.java:297)
at com.atlassian.renderer.v2.components.MacroRendererComponent.processMacro(MacroRendererComponent.java:255)
at com.atlassian.renderer.v2.components.MacroRendererComponent.makeMacro(MacroRendererComponent.java:151)
at com.atlassian.renderer.v2.components.WikiContentRendererHandler.handleMacro(WikiContentRendererHandler.java:18)
at com.atlassian.renderer.v2.WikiMarkupParser.makeMacro(WikiMarkupParser.java:126)
at com.atlassian.renderer.v2.WikiMarkupParser.makeMacro(WikiMarkupParser.java:114)
at com.atlassian.renderer.v2.WikiMarkupParser.handlePotentialMacro(WikiMarkupParser.java:99)
at com.atlassian.renderer.v2.WikiMarkupParser.parse(WikiMarkupParser.java:60)
at com.atlassian.renderer.v2.components.MacroRendererComponent.render(MacroRendererComponent.java:47)
at com.atlassian.renderer.v2.V2Renderer.render(V2Renderer.java:53)
at com.atlassian.renderer.v2.plugin.PluggableV2Renderer.render(PluggableV2Renderer.java:30)
at com.atlassian.renderer.v2.V2SubRenderer.render(V2SubRenderer.java:44)
at com.atlassian.renderer.v2.components.MacroRendererComponent.processMacro(MacroRendererComponent.java:252)
at com.atlassian.renderer.v2.components.MacroRendererComponent.makeMacro(MacroRendererComponent.java:151)
at com.atlassian.renderer.v2.components.WikiContentRendererHandler.handleMacro(WikiContentRendererHandler.java:18)