serious commit problem

[Nils9]

Sometimes it happens. It was reproduced several times. What happens:

Checkout a branch, change one file, commit it back, then right after that,
checkout next branch (contains the same file), quickly change it too (the same
changes as in first branch) and commit back, and when you checkout the first
branch again, the file changes are gone in this branch! The file changes both
times were performed by overwriting the checked-out file with new version,
and commited back.

Enviroment: cvs server runs on Linux RadHat 6.2, pserver, xinted.
Clients: Win2K/WinNT4 with several last WinCVS versions, problem
was reproduced also with version WinCVS 1.2. Diskspaces and tempspaces
are free enough on clients and on server.
Checked time, the server is 5 minutes late.

Any ideas?

-Nils Jakobson
SWH Technology