I'm sorry I had no time even for such trivial thing. But now I see there is such package in extras repository:

http://maemo.org/packages/view/libgcrypt11/

Does it help you?

What could be the reason that KeePassX v2 segfaults after I have entered the correct password of a kdbx file?

I'm sorry I have no clue without the core dump.

v2 (from February '13) used to work on CSSU/Stable for me, but now (since a forced fresh reflash of PR1.3 then upgraded to CSSU/Testing) using the same keepass db file runs ok but fails to import the database saying its not a keepass db (when same file works elsewhere on other clients).
When I wonder if its a v1 database that needs importing, and try that main menu option on the N900, it seg-faults (as reported via stderr from a run-standalone.sh run in a terminal, after it did the same thing from app menu/desktop shortcut). It shouldn't crash like that whether it was v1 db or not, whatever format the input database is in.

Not yet got a core file out of it but would like to, and willing to help fix it/even work on it if I can create a build environment for it without too much trouble

The db was maybe edited a bit with other keepass editors on Linux/Windows since last used on the N900 ok but should be readable the same as I also did that before and it worked.