Vista/XP

[ddouglass]

This may not work since it isn't all of your song files, but I would try it and see if it helps.
Open Hoster 3.4. Open Tools/Playback Offset. Set it to -0.5. Close Hoster 3.4 and open Hoster 4.06a. Try some of the songs that are lagging and then try some that aren't to see if it affects any of them. If it is affecting both then it won't work because you will throw the majority of them off. Go back and reset the offset to 0.
This offset control has been added back into the next release so you won't have to go between the programs to set it. For now setting it in 3.4 also sets it for 4.06a.