Same (or similar) problem here on an HP laptop. The larger problem is that keyboard controls don't work at all on Thunderbird, but the delete operation is the one that I use most frequently. Arrow and tab navigation do not work either though. Opening a message in a new tab seems to correct the problem in some cases.
Same (or similar) problem here on an HP laptop. The larger problem is that keyboard controls don't work at all on Thunderbird, but the delete operation is the one that I use most frequently. Arrow and tab navigation do not work either though. Opening a message in a new tab seems to correct the problem in some cases.