Multi Format Timeline
 

I am currently cutting a sequence in FCP6 which includes both 24p and 60i HDV footage. The majority is 24p and the sequence is set for 24p however I do not get the dialog box offering to change sequence settings to match clip settings when I add a 60i clip to the timeline. It did at one time but it has subsequently disappeared. Is the absence of this dialogue box an issue and if so can I turn it back on somehow?
The timeline plays back fine in realtime, although I haven't yet tried to output the sequence to Compressor or DVD Studio Pro etc.
Thanks as always.
Rich