List of possible issues of Mac OS 10.5.2 are:

1. Leopard still doesn't see Tiger when File Sharing (no files show up when connected in Network). A Tiger machine can still connect to a machine running 10.5.0 through 10.5.2
   
   
   
2. Parental Controls still uses 100% cpu
   
   
   
3. Airport connection disconnects every 15 minutes or so, scans, then comes back on. (update: only on 5ghz 802.11n. Stable on 2.4ghz 802.11n) (Macbook Pro) -(this is not true for my 2.33 GHz MacBook Pro. I have a rock-solid Airport connection to my AEBS running 5 GHz 802.11n-only ~ shadowfax) - Tested again and still having disconnects on 5Ghz, using 3rd party nCard from Quickertek. Rock solid at 2.4Ghz
   
   
   
4. Time Machine still can't back up to my wireless Airport Disk.
   
   
   
5. (Unverified) The "new mail sound" in Mail.app is still very sporadic. When new e-mails arrive in the inbox, the sound signaling that a new message has arrived only works less than half of the time. This was the same problem in 10.5.1. (White 17" iMac C2D 2.0, 3 gb ram).
   
   
   
6. (Unverified) Yahoo! Mail (non-classic mode) still makes Safari 3 crash very often. I'm guessing it is somehow linked to flash (White 17" iMac C2D 2.0, 3 gb ram).
   
   
   
7. (Unverified) The long delay when repairing permissions still remains. The "ACL" message still persists.
   
   
   
8. (Unverified) The "iMac insomnia" issue persists. The iMac will not enter sleep on its own after the requisite time setting. It will, however, enter sleep when forced from the Apple menu. This problem was present in 10.4.4 but fixed by 10.4.11. It reappeared in 10.5.0. (White 17" iMac C2D 2.0, 3 gb ram).
   
   
   
9. If stacks are set to display as "folder" and folders are given custom icons, the custom icons initially appear and then will disappear after a restart. Changing the stacks back to display as "stack" and then back to "folders" allows the custom icons to be displayed again (must be repeated after every restart). This issue can be easily fixed by recreating the stacks. Newly created stacks retain their custom icons after reboots.
   
   
   
10. The "hiss and pop" that had afflicted the MBP when using the audio out still persists.
    
    
    
11. Certain video files played in window view in iTunes still skip.
    
    
    
12. Notes in Mail.app still don't work at all. Sometimes you can create a new Note, sometimes not. everytime this stops working, Mail.app also hangs while tring to quit.
    
    
    
13. Mail.app in Leopard does not allow for boolean search, something that was possible in Tiger
    
    
    
14. Speakable items steals esc key press, even when set to listen continuously.
    
    
    
15. iSync fails to open - gives one dock bounce and then stops
    
    
    
16. Can't traverse new List view after Disk utility un-mounts and re-mounts the drive in which the folders reside on. Restarting Dock (killall Dock) returns the functionality.
    
    
    
17. After updating to 10.5.2, can no longer see or connect to my access point (Linksys WRT45G). Can see AP's for everyone else in a 3 block radius, but can no longer see or connect to my own.
    
    
    
18. Aperture lists D300 files as "unsupported image format" though the files can be opened in preview and the D300 is now listed as part of the new updates
    
    
    
19. Spotlight in a finder window defaults back to whole computer instead of the directory I have navigated to. While technically not a bug this default behavior makes no sense and is very user unfriendly.
    
    
    
20. Mail attachments when I save don’t show up in the save like the used to in Tiger. Attachments get dropped even though the check mark is on to keep them.
    
    
    
21. Time Machine missing graphics elements
    
    
    
22. Red and Green screen flashes.
    
    
    
23. In column view and then spotlight in the window then hit back button it switches to list view instead of column view like I had it.
    
    
    
24. In icon view shift clicking does not select a range but acts like command clicking does.
    
    
    
25. Safari has Javascript problems.
    
    
    
26. After Software update performs and then says successful (or restart now option) going to a different space hides the popped up window and Apple-Tabbing back or clicking on Software Update in the dock does not revert back to the space with the window so you need to manually go through each space to find it to take action for Software Update to be happy. - Also with other apps when having a dialogue box up.
    
    
    
27. Linotype FontExplorer X causes the Dock to freeze when accessing Stacks in Grid or Fan view. UPDATE: Linotype has released a 10.5 compatible version of FontExplorer X
    
    
    
28. After update, FileSyncAgent CP hangs at around 99.9-100% even when no file writes are occuring. Runaway process that requires a manual kill or reboot.
    
    
    
29. The graphics when opening the Applications stack is still a very "choppy" animation as it was before.
    
    
    
30. GrowlMail Plugin is automatically disabled by 10.5.2 for versions of growl 1.1.2 (current) on down.
    
    
    
31. Active Directory still not assigning correct permissions to Administrative users. Admins in AD are considered Standard users in Leopard.
    
    
    
32. MacBook (Core 2 Duo) still not producing full bar wireless strength when connected to my AP. (I have an exact MacBook with 10.4.11 and it gets a full bar wireless signal to my access point.)
    
    
    
33. Automator action "Set spotlight comments for finder items" is still broken (it was broken by 10.5.0). It works from Automator but not as a Finder plug-in.
    
    
    
34. PowerPoint 2008 is much less responsive and has spinning beach ball when loading. That was not present under 10.5.1.
    
    
    
35. Upon deletion of material through Time Machine, the F9-F12 keys lose their functionality in the Exposé and Spaces Preferences. Present since 10.5.0, not fixed in 10.5.2.
    
    
    
36. Mac Pro wake from sleep issues remain unresolved for 2008 Harpertown Mac Pro. Computer reboots on wakeup.
    
    
    
37. When watching a DVD in full screen the menu will go black after a period of time - only rebooting Leopard fixes it. This has been present in 10.5.0 and 10.5.1
    
    
    
38. After installing 10.5.2 (along with the iLife support download and Leopard graphics update that immediate followed the 10.5.2 update) your volume control may appear to freeze up. This problem was observed on an Early 2008 Mac Pro immediately after install and multiple restarts. The fix is simple: you need to go to System Preferences and under "Sound" go to the "Output" tab and select "internal speaker". The slider will activate and your volume icon in the top-of-screen bar will no longer be locked out.
    
    
    
39. After installing 10.5.2, Flip4Mac may no longer work. Uninstall and re-install of WMV Components fixed it for the user that reported it.
    
    
    
40. Translucency of Menu Bar is lost upon MacBook shutting off due to battery being drained. Plugging it back in shows the bug.
    
    
    
41. On MBP, animation of stacks in grid view is very choppy, when on battery power. Animation becomes smooth when AC power is plugged into laptop.
    
    
    
42. When using a digital speaker system (sound out set to digital out) the sound can no longer be muted via the keyboard - this worked in Tiger and in 10.5 and 10.5.1
    
    
    
43. Mail.app demonstrates a peculiar behavior. Under account settings, the "save drafts" function was disabled by user only to be turned on automatically by Mail.app a few days later. A "drafts" folder was created on the server even though the user never made any unsent drafts of messages.

See Also:

Mac OS X 10.5.2 Fixes and features

Mac OS X 10.5.2 Troubleshooting and Tips