Yes I noticed this too.

I just got back from a 700 mi journey (both ways) and the ETA was consistant... but consistently wrong.

Sygic also stopped responding @ approximately 5 hours into the trip. I use the camera button to minimize the thing and when I did this time a notification popped up stating I didn't have enough memory to open the camera app!

The only other app running was Instinctiv as a music player.

To eliminate Instinctive as a culprit, on the way home I used the N900's media player for music instead. At about 5 hours the same thing happened.

Sygic has a memory problem and it hogs resources and doesn't give them back. Earlier in this thread someone confirmed that the text input box in other programs doesn't work as expected while Sygic is running. The same thing happens with the volume slider.

If you have the option to use the volume rocker for "zoom" enabled in the browser, it will not work with Sygic running in the background. It instead reverts to a volume control while using the browser regardless of the settings used.

I have attached a couple of images where I was sitting at a ferry terminal and Sygic would not recognize it and continued to route me on dry land.

The only way I could get the ferry recognized was to select "alternate route" but even then it would only suggest the ferry if I selected "avoid traffic delays"