Yes. Same here. End then tab seems to work.
lets say you category is structured like "Hardware - Printers - Paper empty ".
Start with the "H" it should bring up Hardware. Next hit "-" it jumps to the next level. Hit "P", Printer (or whatever else starts with P) should be auto selected. Again hit "-" and you are on the third level. Hit "P" and you have "Paper empty". Now jump to the end by "End" or Arrow right and the category stay if you now hit "Tab".
Another possibility to navigate through the categorioes is to use the arrows keys up,down,left and right.
Hope that helps.
The behaviour did indeed change in 7.4, although it wasn't intentional. It was logged as Problem 5106 which I'm happy to report has been fixed for the next release. Until then you'll need to use END then TAB has Graham suggested which seems to do the trick.