Mapscript queryByAttributes() not working in 4.10

[Stuart Eve]

Hi all

We have just upgraded to Mapserver 4.10 in order to use the Mapscript 
WMS support, etc. However now it seems like the queryByAttributes() call 
we make in our application is no longer returning any records. The call 
runs ok, just it has no results.

The layer is a shapefile, and if I change our php_mapscript.so back to 
4.8 the query runs totally fine and returns the results. I had a look to 
see if there are any listed bugs, but the only bug seems to relate to 
PostGIS layers... has anyone else encountered this behaviour?

Thanks

Stuart