I don't see any timebomb...
The log could use a few more sides to it (as a single log); the bump/normal map on the log should be confined to the uncut portion (ie., the bark).
The buttercutter-like hole punches look ok; however, the texture is missing on the inside faces of the holes...it's just gray.
You might want to scale down the gravel texture in the first shot, as it looks a bit on the large sides (per pebble).
A tip for you: Try setting up an actual scene using your work, then add some nice lighting, etc. It shows potential customers what is possible with your pack. You could also mix in a few items from the stock TGC library; it shows that your textures are compatible with the rest of the stock FPSC items.
-Keith
