Selecting the Help, Check for Updates menu item opened the web browser and displayed an error:

Not Found

The requested URL /version-check.php was not found on this server.
Apache Server at wb.mysql.com Port 80

(Bug#50415)

When building MySQL Workbench 5.2.11 from source on CentOS 5.4, the following error occurred:

python_context.cpp:388: error: invalid conversion from 'const char*' to 'char*'
python_context.cpp:388: error:   initializing argument 1 of 'PyObject*
PyImport_ImportModule(char*)'
make[4]: *** [python_context.lo] Error 1
make[4]: Leaving directory `/home/install/mysql-workbench-oss-5.2.11/library/grt/src'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/install/mysql-workbench-oss-5.2.11/library/grt'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/install/mysql-workbench-oss-5.2.11/library'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/install/mysql-workbench-oss-5.2.11'
make: *** [all] Error 2

Note, from MySQL Workbench 5.2.13, binary and source packages for CentOS 5.4 will be available. Due to the dependence of MySQL Workbench on certain packages that are older in CentOS 5.4 than in other operating systems, MySQL Workbench has some minor features, such as tool tips, disabled. (Bug#50360)

In the SQL Editor, if a routine was edited, and the changes applied, then the changes were automatically reverted if the apply failed. This meant that any changes the user had made had to be typed in again. (Bug#49790)

In the SQL Editor, if an object was created or renamed, that change was not reflected in the user interface. This change fixes the problem for Linux and Mac OS X. See also Bug#50424 for the Windows platform. (Bug#49454)

Invalid values were written to the MySQL server configuration file by the configuration editor. MySQL Workbench also added new entries to the configuration file, rather than update the existing entries. As a result of the this the server failed to start. (Bug#49420)

If the server configuration file contained more than one entry for replicate-do-db, then the configuration editor on the Admin tab only displayed the second entry, rather than both. (Bug#49299)

In the configuration editor in the Admin tab, the listboxes for displaying units, such as for the Sort buffer size option, did not show 'G', which represents Gigabytes. This bug was fixed in 5.2.10.

It was subsequently decided to standardize all units around uppercase characters. In particular the 'k' was changed to 'K'. This change was made in version 5.2.13. (Bug#49013)