Just a few hours after Apple released an important update for its OS X Leopard operating system, it seems that the company may have fixed some issues but it has created its own. The update, which was released on Monday, consisted of 21 patches addressing security flaws, bugs and general improvement of the operating system.

Apple’s online support board was filled with user reports about different issues that the update created on their systems. Many of them state that the system freezes even during the install. Other major issues of which the users are complaining about are the malfunction of the Bluetooth connectivity, general system errors (the famous blue screens) and power saving settings. It seems that even the applications are affected by the update, as several users had stated that the Safari web browser crashes very often.

Yet, Apple warned users that there are several risks concerning the update. In a note on its website, the company pointed out that users might experience “unexpected results” if they relocated applications in other locations than the defaults. Furthermore, users are warned that modifying the operating systems through “other means” and through installing 3rd party application may also lead to errors or failure in deploying the update on their systems.

The update for the Leopard operating system addresses several issues of the operating systems and of some of its applications. Apple states that users should see improvements in iChat, Mail, Safari and Time Machine. Graphical intensive application as games and Adobe C3 will perform better, too, as the update tweaks and improves systems which have ATI graphics cards.