If you'd like, you could try and changing the 'Standard' grid color scheme in Adagio, though this would affect all users in Adagio and not just your workstation and not just Adagio Invoices batches. In an Adagio program that supports editing Styles, go to the File menu and pick Styles. Near the bottom of the list is the Standard style for rows in grids. If you edit this style, you will see 2 different colors - the regular grid color (white background and black font), and a Selected color when a row is clicked. You could try changing the Selected Background Color to something a little more bold and visible.
Installing upgrades for other Adagio programs shouldn't have affected this, though the Styles colour file is commonly used across all Adagio programs and companies. The only thing I can think of that could be related to this is that the Standard Background color got changed when Receivables added it's application-specific styles - though this is not something we know about and is just a guess at a possible cause.
The Windows Color Theme (ie Aero or not, the color palette, etc) can have an effect on grid colors, which is why I asked.
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Softrak Tech Support