[Inkscape-user] SVG source images get goofed up when combined

I often use Inkscape to build network diagrams. I've collected a number of SVG images (mostly from Tango Icons) which I use as objects in those diagrams. On my Ubuntu Hardy box today I discovered that once I get a number of objects into a document, if I import a single new object, the colors on it get all messed up upon import. This never happened before. Opening the object alone, or importing it into a new document works fine. Have any of you seen this behavior in .46? If so, have you figured out a work-around? Might it have something to do with the (new?) color management stuff? I chose not to attach files to the list because they are rather large, but I would be happy to send examples to anyone interested in exploring this off-list.