Cпасибо. Вот нашел:
To cope with the new versioning system's use of at least three significant digits for each version component, the method used for incrementing the subversion number has also changed slightly. We assume that versions older than v5.6.0 have been incrementing the subversion component in multiples of 10. Versions after v5.6.0 will increment them by 1. Thus, using the new notation, 5.005_03 is the ``same'' as v5.5.30, and the first maintenance version following v5.6.0 will be v5.6.1 (which should be read as being equivalent to a floating point value of 5.006_001 in the older format, stored in $])
Получается у нас там 5.5.30 версия.
Неизвестно вообще, будут ли мои скрипты, тестированные на линуксе и на виндоузе с 5.8.4 работать на этом сервере?