KDE SC 4.5.0: Dolphin instable

[Peter Penz]

Hi,

I'm very sorry for noticing you that late, but my timing to recognize the root 
cause of some Dolphin related crashes was very bad this time: Dolphin might be 
instable in KDE SC 4.5.0, when tooltips or the information panel are enabled.

Sebastian Trüg and I provided two patches on the 4.5 branch that solve this 
issues (SVN commit 1157302 and 1158299 [1]), but of course it is too late now 
for 4.5.0.

If possible, I think this should be mentioned in the release notes as known 
issue. A suggestion of the text might be: "Dolphin might be instable in KDE SC 
4.5.0, when tooltips or the information panel are enabled. A fix will be 
available for KDE SC 4.5.1."

Some background info: Dolphin receives the meta data shown in tooltips or the 
information panel in a thread, to assure that the user interface does not get 
blocked. Before KDE SC 4.5 it just used Nepomuk to get the data, since 4.5 it 
uses KFileMetaInfo as fallback when Nepomuk is disabled. It turned out, that 
KFileMetaInfo is not reentrant, which of course is a disaster when being used 
in a thread. I initially thought this is related to a d-bus issue 
(https://bugs.freedesktop.org/show_bug.cgi?id=17754), but sadly was wrong here 
:-(

Best regards,
Peter

[1] I still need to go manually through all tooltip and information panel 
related bug reports, to set them to resolved. But I did not want to do this in 
a hurry, so the patches currently don't contain BUG: tags.

PS: I'm offline today, but should be available again tomorrow.