Hmm, weird... The backtrace is not very useful without debug symbols installed.
I guess this error is related to an LCL <> GTK2 incompatibility, which has been fixed with rev6 of this package / a new upload of the Lazarus package.
We will have this fixed in Oneiric :-)
(You maybe can combine the rev6 debug package with the rev5 package btw.)
Hmm, weird... The backtrace is not very useful without debug symbols installed.
I guess this error is related to an LCL <> GTK2 incompatibility, which has been fixed with rev6 of this package / a new upload of the Lazarus package.
We will have this fixed in Oneiric :-)
(You maybe can combine the rev6 debug package with the rev5 package btw.)