Filtering and keyup problems in RichFaces4 M3

[mettehummel]

I'm using RichFaces4 Milestone 3. I have an extendedDataTable and I'm trying to add filter functionality according to the examples in the showcase. It works as expected with the blur event. When I change to use the keyup event the filtering still works, but after every keypress I need to navigate back to the filter field. It seems to loose track of which field the cursor was in. Why?

                        <rich:column width= "80px" label= "Feltnr."

                                filterValue="#{feltBean.feltnrFilter}"

                                filterExpression="#{fn:containsIgnoreCase(brkoVar.feltnr,feltBean.feltnrFilter)}">

                                <f:facet name= "header">

                                        <h:outputText value= "Feltnr."

                                        <h:inputText onmousedown="event.stopPropagation()"

                                                value="#{feltBean.feltnrFilter}">

                                                <a4j:ajax event= "keyup" render= "tabell" execute= "@this" />

                                        </h:inputText>

                                </f:facet>

                                <h:inputText id="bronnoysundkodeFeltnr" value="#{brkoVar.feltnr}"size="3" />

                        </rich:column>