Just did update Maemo Mapper to v 2.5.

It seems that with this version it a takes much longer to download new map tiles.

Before, with v 2.4.x, when zooming into an area where no map tiles had been donwloaded yet, the "processing maps" (or whatever it is called) popup came up, download did start and cpu load did go up.
At about the same time the new map data was visible in full resolution, also the the progress indicator in the info popup did reach 100% and the CPU load was going down again.

Now with 2.5 the behaviour is a bit different. When downloading new map tiles, all new tiles are visible at full resolution when the "processing maps" progress indicator reaches about 30%. This is taking roughly the same time it took with previous versions to download new tiles.
Then the progress indicator for ~10 seconds is going through the other ~70% without any further visible changes to the diplayed map. During this time the CPU ist still maxed out, so further panning or zooming is almost impossbile.

Any idea what might be the problem here?

Map repositories installed: Openstreetmap, Google Street, Google Satelite, VE Street, VE Satelite, VE Hybrid, Yahoo Street, Yahoo Satelite.

this issue affects all maps.

I'm not using the new layers feature and I didn't change any settings after updating to 2.5.