I do not know if anyone noticed this; but there was an incompatible change from MySQL 5.1.22 to 5.1.23 in mysql_com.h file for NET structure by renaming the members last_errno and last_error to client_last_errno and client_last_error. This is really annoying as it not just breaks the compilation of lot of depending applications; and functionality will be annoy if one uses the wrong client library as there is no protocol version change. The change should have been done in alpha or beta code but not when its tagged as Release Candidate (RC). The change history does not even have a clue of this change.

Now; I noticed that in 5.1.24 the change is reverted back. I guess someone should be very careful when changing any structures related to the protocol as it could break the things silently.

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