Either you or the comments in the stock transitions.ini are wrong here.radius/radius_more are stated as "amount of iterations of blur filter" and given default values of 12 and 16, respectively -- obviously integers. zoom_applets is described as "amount to scale applets by", so I'm pretty sure 1 is no zoom, 2 is increase, and 0.5 is decrease; it's unclear what 0 does for either of the scales, but it's probably special-cased, since actually scaling things by zero tends to introduce divide-by-zero errors. (IIRC scale factors greater than 1 actually do work as expected, though it's not typically desirable...) It makes me wonder if you deleted your original transitions.ini, and had to reverse-engineer this from a comment-stripped sample? The original will be attached shortly, if that helps. EDIT: attached!