Hi, I have been having the same problem as you guys.
It seems that the pionner doesn't fully support overburning.
I have tried almost every software known to man to try and overburn an SVCD to no avail. I just get the same 'Invalid field in parameter' error with every software I've tried, but thankfully after extensive testing I have a solution.
I have a Pioneer 106, but this should work on earlier versiions too.
First of all create the SVCD image with VCDeasy then load that into DAEMON tools.
Download CloneCD (I'm using 4.2.02) then just use the CD to CD copy option and hey presto! an overburned disk without any problems.
Hope it works for you too, let me know how you get on.