"Filles de Kilimanjaro" is an intresting study on rhythm. The bass figure at first melody chorus suggests a 3/4 time, but shifts into 4/4 time for second melody chorus. Note that the bass line is not a detailed note-for-note transcription, but rather an overview of its rhythm. Since the drum pattern doesn't make a clear difference between the downbeats and upbeats, I used the bass figure as determination for time signature. The melodic rhythm (played by the horns) suggests a 4/4 time when starting it on the first beat. The 2nd melody chorus, however, begins on the 2nd beat of the bass pattern. I guess, that the 4/4 bass figure in my chart should start on the 2nd beat instead, like shown in Ed's transcription (http://www.freejazzinstitute.org/showposts.php?dept=transcriptions&topic=20081106105012_EdByrne).
The bass figure descends a half step to F# at bars 31-37. However, on the 2nd chorus - which is played in 4/4 time - the bass figure holds in G throughout. Apparently the piece is in large part improvised - especially the rhythm section is toying with rhythms and harmonies. The varying rhythms seem to challenge the musicians, but they manage to hold the cheerful piece together to the end. It can also be regarded as polyrhythmic tune, since there occur simultaneous independent rhythms.