Latest svn. Load any sufficiently long document and scroll it down and up using the arrow keys. Sooner than later LyX asserts. I get two different assertions:
Assertion triggered in lyx::Point lyx::CoordCache::get(const lyx::LyXText*, lyx::pit_type) const by failing check "posit != it->second.end()" in file ../../src/coordcache.C:57 and Assertion triggered in bool lyx::LyXText::deleteEmptyParagraphMechanism(lyx::LCursor&, lyx::LCursor&, bool&) by failing check "old.text() == this" in file ../../src/text2.C:1280 depending on the sequence of actions I perform. BTW, happy new year to all! -- Enrico