I'm seeing the same problem in Ubuntu 10.04.1 LTS with Gnome. The problem appeared after I removed OpenOffice and installed LibreOffice 3.4.5 in its place. I tried removing software-center and reinstalling it from the repository, but it didn't fix the problem.
There was an anomaly immediately after the OpenOffice-LibreOffice changeover. When I ran Update Manager it indicated that only a partial upgrade was possible due to a dependency mismatch, or something to that effect. I proceeded with the so-called "partial upgrade" and happened to notice that it removed cups-pdf in the process, along with several other items that should NOT have been removed, leaving me without a PDF printer driver. I subsequently reinstalled cups-pdf via a terminal window. When I ran Update Manager again it said my system was up-to-date and everything appeared to be in order. However, when I now open Software Center, it runs extremely slowly and the Fonts icon does not get populated. When I click on the various Get Software icons, the subsequent screens take a very long time to load and most of the second-level icons are missing, exactly as shown in the screen shot by Steve Beattie (sbeattie) on 2010-04-06. The animated "busy" cursor is displayed and the window doesn't get populated with icons at all sometimes.
I'm seeing the same problem in Ubuntu 10.04.1 LTS with Gnome. The problem appeared after I removed OpenOffice and installed LibreOffice 3.4.5 in its place. I tried removing software-center and reinstalling it from the repository, but it didn't fix the problem.
There was an anomaly immediately after the OpenOffice- LibreOffice changeover. When I ran Update Manager it indicated that only a partial upgrade was possible due to a dependency mismatch, or something to that effect. I proceeded with the so-called "partial upgrade" and happened to notice that it removed cups-pdf in the process, along with several other items that should NOT have been removed, leaving me without a PDF printer driver. I subsequently reinstalled cups-pdf via a terminal window. When I ran Update Manager again it said my system was up-to-date and everything appeared to be in order. However, when I now open Software Center, it runs extremely slowly and the Fonts icon does not get populated. When I click on the various Get Software icons, the subsequent screens take a very long time to load and most of the second-level icons are missing, exactly as shown in the screen shot by Steve Beattie (sbeattie) on 2010-04-06. The animated "busy" cursor is displayed and the window doesn't get populated with icons at all sometimes.