On updating from 0.47 to 0.48 I get the errror message shown in the first screenshot and after pressing ok the error message shown in the second screenshot.
Then the installation and deinstallation programs are started at the same time. I choose to uninstall first, of course. The progress bar flickers a little bit with the bar standing at approximately 50%. There is no real progress, but the details say that all files were deleted. Though, they all still exist.
Installation works fine, but at the end I can see that uninstall.dat gets deleted. Should this be the case?
Installing in administrator mode (registry root will be HKLM)
Adding Inkscape to SVG file context menu
Finalizing installation
Create shortcut: C:\Dokumente und Einstellungen\All Users\Startmenü\Programme\Inkscape.lnk
Rename: C:\DOKUME~1\larsen\LOKALE~1\Temp\nsy503.tmp\unlog.tmp->C:\Programme\Inkscape\Uninstall.dat
Created uninstaller: C:\Programme\Inkscape\Uninstall.exe
Creating MD5 checksums
Delete file: C:\Programme\Inkscape\Uninstall.dat
Completed
OS is Windows XP SP3 German
Same error messages (in French), and 0.47 files are not uninstalled, but the new 0.48 install works fine.
The Uninstall.log file doesn't list all the installed files and uninstalling 0.48 leads to the same result as with 0.47: most installed files are not uninstalled.
But if I remove all the remaining 0.47 files before installing 0.48, everything works correctly (Uninstall.dat is also deleted, but it's probably not a problem) and I can then uninstall 0.48 without any issue.
Thus I'd say this bug is a 0.47 one which is now fixed in 0.48.
@Chris, why does the 0.48 install process create an incomplete uninstall log file? Since all the files are overwritten by the new install, we should have a correct log. I suggest that we post a notice in the download page so that users delete the old install folder completely. Is there anything else we can do?