Duplicate generated ids

IdGenerator of javascriptSupport PartialMarkupRendererFilter is using Long.toHexString(System.currentTimeMillis()) as a suffix for ids.If two ajax requests arrive at the same time they will both have the same suffix.If both request will render a component named Sort (From grid) then many sort links will have same ids.Found it out because i had 10 progressive displays in my page each drawing an inPlace grid.Some of the sort links will also sort another grid when clicked since they have the same id.