iDVD hangs but finishes

Made a 1h 20 min movie in iMovie (6.0.2). Sent it to iDVD (6.0.2). Choosed a theme and started to burn DVD.
Menus were created and then iDVD hanged. Just shows that Encoding Audio and that is all!

Processor load is at max, Activity Monitor shows also that iDVD takes about 60-80% of processor time while being (Not responding). From View > Inspect process shows some development, iDVD interface gives you spinning wheel of death :P

It is possible to see open files and ports. Since there are files coming to that list constantly I presume we still have some action going on. So it is better to wait?!

UPDATE: All good things come to those who can wait! So it took 10h to encode 1h 20 min movie to MPEG2 from DV captured from camera (1.5Ghz Power G4, 1G RAM). Pure processor time taken from Activity Monitor was about 5h. Most of the time iDVD was "Not responding" and at the very end it woke up again and interface was accessible again.
Just in case I had it burning image rather than straight DVD. iDVD created DVD image and then at the end it hanged again. This time no remarkable processor load.
Burned DVD with Disk Utility and after it was finished and DVD worked fine, then quit iDVD.

Average user... mhh hard to belive he would wait all that time. No progress indication etc.. Does Apple has any testing for its software at all?