Quicktags and JS Aggregation

Anyone using quicktags in conjunction with Javascript Aggregator?
I see the following report on my site (even when "excluding" quicktags.js from aggregation).
If I completely disable aggregation ten the Quicktags icons will show up nicely.
...or maybe this should go into JS Aggregator issues queue?

warning: filemtime() [function.filemtime]: stat failed for ?q=quicktags in
[...]/modules/javascript_aggregator/javascript_aggregator.module on line 49.