In XnView MP 0.48 there is a small enhancement feature to the Drag & Drop of Image files to the view mode meaning we can now hold (modifier key) 'SHIFT' while dragging an image to an existing opened view tab to simply replace the tab/re-use the existing tab rather than the picture opening in another separate tab.
Unfortunately with all new features added by programmers comes these little glitches (bugs) which must be addressed to make the feature fully complete

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Right, to reproduce;
1.) Run a 'clean' XnView MP 0.48
2.) Open just a single picture from the Browser, to open in view mode as one tab
4.) Make a new folder in Win Explorer and put 10 random test Image files (pictures jpg/png etc) in this new folder
5.) Drag & drop just One image file from the folder to XnViewMP....And then hold 'Shift'.....
6.) Drop this file on the already opened view tab (while still holding 'Shift')
7.) View tab gets replaced with dropped file successfully

8.) Now notice that you cannot next/prev to other files in the same folder, the file-list says 1/1 instead of the correct 1/10
Please fix, thank you.
Windows 7 sp1 and Windows XP sp3, XnView MP v0.48 x86
Note: Perhaps 'Shift' should be changed by Pierre to instead use 'Ctrl' for this action, might be better??
Related topic: http://newsgroup.xnview.com/viewtopic.php?f=62&t=25480