Using Windows Server 2008 with KDE 4.0.73 and Qt4.4. Things I have found:

[edit] Bugs that WORKSFORME/FIXED

These bugs don't happen in KDE4.0.73.

• bug #154859 - MS-Windows drive letter appears as "Custom Path".
• bug #158038 - Duplicate of above.
• bug #156159 - Problems with drive letter in path. Doesn't happen. Though, "x:" not working in Dolphin.
• bug #160037 - Changing to view other than Icons crashes Dolphin.
• bug #156456 - Renaming the same file multiple times crashes. Doesn't happen in KDE4.0.73.
• bug #156446 - Adding ".jpg" extension to a ".zip" filename makes dolphin unable to find it. Doesn't happen. However, it opens a new bug where directly typing a filename in to the directory bar says file not found.
• bug #159968 - Rendering issues with text boxes.
• bug #157469 - Rendering issue with repeating images.
• bug #161574 - Moving items to trash fails.
• bug #156690 - Home button not working.
• bug #157764 - Umbrello multiplatform bug fixed in SVN.
• bug #153565 - Help button not working.
• bug #156458 - Dolphin fonts are wrong.

[edit] Bugs that I CONFIRMED

• bug #160030 - Loading bar is fixed at 90% on Dolphin
• bug #158034 - Dolphin cannot run executable files, even via cmd.exe CRITICAL!
• bug #156467 - Clicking icon next to URL does not select all text as it should.

[edit] Bugs that need more INFORMATION

• bug #161039 - Something about kcmshell4? What does it relate to konqueror?
• bug #161071 - Something about kcmshell4? What does it relate to konqueror? Need more information.