  It has been recently demonstrated that the recurring high/low states in the
peculiar binary V Sge can be explained by considering the limit-cycle
oscillation involving negative feedback by the wind on the mass-transfer from
the secondary star. We noticed, from the recent observations reported to the
VSNET (http://www.kusastro.kyoto-u.ac.jp/vsnet/), the presence of a different
state of recurring variations (recurrence time ~30 d) showing a gradual rise
and a sudden drop in brightness. The observed features of this light variation
are unlikely to be reproduced by the limit-cycle oscillation mechanism
involving a mass-transfer variation from the secondary star (Hachisu, Kato
2003, astro-ph/0308065). We suggest that the phenomenon originates from an
unidentified intrinsic instability in the disk or in the wind of a high
luminosity object as in V Sge.
