split doesn't update numTopics

[sagi]

YaBB SE Version: 1.5.2 to 1.5.4
PHP Version: 4.3.4
MySQL Version: 4.0.x
Server Platform: Unix, Linux, or BSD

Problem Description:
Hello

When using the split message function in yabbse 1.5.4 the numTopics field in yabbse_boards doesn't get updated.

This bug is causing many topics to disappear from the messages index.

Using the "recount all board totals" in the admin iface solves this problem, but obviously this solution is not good enough when doing many splits.

Is this a known issue? is there any patch for this bug?