Possible bug when accessing linkchecker debug

When selecting the debug link, on more than one occasion i have had messages similar to the following in some cases the running time is being reported as being 300+ seconds ago

Lastrun: 1207778712
Checking time, max time is 30 seconds
Time record found, it says we have been running since 2008-04-09 23:05:12, which is 63 seconds ago.
No time left, switching to state 0 (not running)
Finishing early
*** Debugging finished ***

Also since de-selecting Check only fully qualified URLs only - I get the following report in debug , it appears that it may have stalled?

Lastrun: 1207779195
Checking time, max time is 30 seconds
Setting the process state to 1 (running)
Time left:30
SELECT * FROM `linkchecker_tasks` WHERE `update` < FROM_UNIXTIME(1205187214)
Processing task 177
Loading node 2755