[Swftools-common] an unexpected behavior with swfc compiler

[luc luc]

Hello ; I'm surprised with the flash obtained with those instructions :

.flash filename="/tmp/ella-temp.swf" version=5 fps=12  bbox=550x440 background="">

.frame 1

.box R1 210 91 color=#000000 fill=#fd0000

.put R1 234 151 alpha=100% pin=center 

.frame 50

.change R1 pin=center 378 143  

.frame 99

.change R1 pin=center 175 114  rotate=-316  

.end # End swf movie

the box rotation starts at frame #1, not at fram #50 or frame #99.

Someone can help ?